1. Freshwater cell in saltwater aquarium:
Draw: A cell with a higher water concentration outside than inside. Draw a saltwater aquarium around it with a lower water concentration outside.Calculate: Water will move from the higher water concentration outside the cell to the lower water concentration inside the cell until equilibrium is reached.Arrows: Draw arrows pointing from outside the cell towards inside the cell to indicate the direction of water movement.Result: The cell will swell due to the influx of water.2. Saltwater cell in saltwater aquarium:
Draw: A cell with a lower water concentration outside than inside. Draw a saltwater aquarium around it with an equal water concentration outside.Calculate: Since the water concentration is the same inside and outside the cell, there will be no net movement of water.Arrows: Draw arrows pointing in both directions to indicate that water is moving in and out of the cell at the same rate.Result: The cell will stay the same size.3. Freshwater cell in distilled water aquarium:
Draw: A cell with a higher water concentration outside than inside. Draw a distilled water aquarium around it with a much higher water concentration outside.Calculate: Water will move from the higher water concentration outside the cell to the lower water concentration inside the cell until equilibrium is reached.Arrows: Draw arrows pointing from outside the cell towards inside the cell to indicate the direction of water movement.Result: The cell will swell significantly due to the influx of water.4. Saltwater cell in distilled water aquarium:
Draw: A cell with a lower water concentration outside than inside. Draw a distilled water aquarium around it with a much higher water concentration outside.Calculate: Water will move from the higher water concentration outside the cell to the lower water concentration inside the cell until equilibrium is reached.Arrows: Draw arrows pointing from outside the cell towards inside the cell to indicate the direction of water movement.Result: The cell will shrink significantly due to the loss of water.What is the saltwater aquarium about?In the context of the above scenario, a saltwater aquarium refers to a container or environment filled with water that has a high concentration of salt.
It is used to create a situation where a cell with a different concentration of solutes (such as a freshwater or saltwater cell) is placed in the environment to study the process of osmosis, which is the movement of water molecules across a semi-permeable membrane from a region of high water concentration to a region of lower water concentration, in order to achieve equilibrium.
Therefore, The concentration of solutes (in this case, salt) in the water affects the movement of water molecules across the membrane, and thus affects the size of the cell placed in it.
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Your endocrine system includes eight major glands throughout your body. These glands make all the hormones, or chemical messengers that travel through your bloodstream to your tissues and organs. Hormones regulate all sorts of body process, like growth and development, metabolism, reproduction, and mood. If your hormone levels are too high or too low, it will affect how your body will function. Your body also may not respond to hormones the way it's supposed to if you are under stress or are ill. There are many endocrine diseases and disorders, Diabetes being the most common and most well-known of these.
Research one of the endocrine disorders found on the website below, or any other that you find. Write a 800 word report on the disorder, including what its symptoms are, who it can affect most, and what other issues it can cause. Also include what medications or treatments are available, how they help control the disorder or relieve symptoms, and how effective they are. Make sure to cite your sources, and include statistics in a table or a graph based on information you found about your disorder.
One endocrine disorder that affects millions of people worldwide is diabetes mellitus.
Explain one endocrine disorder
Diabetes is a chronic condition that occurs when the body is unable to produce or effectively use insulin, a hormone produced by the pancreas that regulates blood glucose levels.
There are two main types of diabetes: type 1 and type 2. Type 1 diabetes, also known as juvenile diabetes, typically develops in childhood or adolescence and is caused by the immune system mistakenly attacking and destroying the cells in the pancreas that produce insulin.
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Hi can someone help me I need help filling in the blanks if any knows please help.
The change that occurred in the sequence of nucleotides that codes for the amino acid isoleucine resulted in the production of threonine.
The mutation in the codon is from ATC to ACT and ACC.
What is a mutation?Changes to the DNA code that make up a gene or chromosome are known as mutations.
When DNA is replicated, mutations can happen spontaneously or as a consequence of exposure to mutagens like radiation or specific chemicals.
Depending on where they occur and how they affect the gene or chromosome, mutations can be harmful, helpful, or have no influence at all. Genetic disorders, cancer, and the long-term evolution of organisms can all result from mutations.
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A student drew a model showing the process of photosynthesis. In this activity, you will review that model and answer questions about it. Part A
Question
Drag each tile to the correct location. Label the model to show the process of photosynthesis. ADP Calvin cycle chloroplast CO2 granum H2O O2 radiant energy sugar
Photosynthesis is the process in which plants convert atmospheric CO2 and water into oxygen and glucose, synthesizing their own food with the help of chlorophyll, present in the chloroplast.
Solar energy is transformed into chemical energy, such the energy found in the glucose molecule, during the process of photosynthesis. In the process of photosynthesis, water is absorbed by the plant from the soil by its roots and carbon dioxide is taken inside the body of the plant through microscopic pores called stomata.
Water and carbon dioxide both serve as photosynthesis' reactants. Oxygen and glucose are created when they mix in the presence of radiant energy of the sunshine. This reaction can be represented as:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
(Refer to the image attached for the representation of the model discussed in the question.)
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The dietary practices of the Inuit in the Arctic regions prove the point that diets rich in fat are not automatically unhealthy. Which of the following statements provides one possible explanation? Unsaturated fats containing Omega 3s reportedly have a positive effect on cardiovascular health.
One possible explanation for why the dietary practices of the Inuit in the Arctic regions prove the point that diets rich in fat are not automatically unhealthy is because the fats that they consume are primarily unsaturated fats containing Omega 3s, which have been shown to have a positive effect on cardiovascular health.
Unsaturated fats are a type of fat that is considered to be healthier than saturated fats, which are typically found in animal products and are associated with an increased risk of heart disease.
Omega 3s, a type of unsaturated fat, have been shown to have a number of health benefits, including reducing inflammation, lowering blood pressure, and reducing the risk of heart disease.
Therefore, the Inuit's diet, which is rich in unsaturated fats and Omega 3s, may be healthier than a diet that is rich in saturated fats, even though both diets are high in fat. This is one possible explanation for why the Inuit's dietary practices prove the point that diets rich in fat are not automatically unhealthy.
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Cape Town, South Africa gets most of the city's water from rain. Recent years of prolonged drought reduced the water supply for the city. If residents do not respond to the shortage, the city will most likely need to provide only a small amount of water per person per day.
What ,begin emphasis,two,end emphasis, actions will ,begin emphasis,best,end emphasis, help people in Cape Town lessen the water shortage problem?
By implementing a combination of conservation measures and diversification of water sources, the city can work towards a more sustainable future for its residents.
What is sustainable resource?A sustainable resource is a resource that is replenished naturally and can be used without depleting it over time. It is a resource that can be utilized without compromising its availability for future generations. Examples of sustainable resources include solar energy, wind energy, geothermal energy, tidal energy, and biomass. These resources can be continuously replenished by natural processes and their use does not lead to their depletion or degradation over time. In contrast, non-sustainable resources are those that are finite and cannot be replenished over time. Examples of non-sustainable resources include fossil fuels, minerals, and other natural resources that are extracted from the earth at a faster rate than they can be replenished. The use of non-sustainable resources can lead to their depletion and contribute to environmental degradation, making it important to transition towards sustainable resources for a more sustainable future.
Here,
There are several actions that could help people in Cape Town lessen the water shortage problem, but two of the best options are:
Water Conservation: One of the most effective ways to reduce water usage in Cape Town is to promote water conservation practices among residents. This can include simple actions like fixing leaks, using low-flow showerheads and faucets, reducing shower time, and collecting and reusing greywater for non-potable purposes. By conserving water, residents can help ensure that the city's limited water supply is used more efficiently.
Diversification of Water Sources: In addition to conservation efforts, Cape Town could also invest in diversifying its water sources to ensure a more reliable supply of water. This could include initiatives like harvesting and treating groundwater, desalinating seawater, and capturing and storing rainwater. By increasing the city's access to alternative sources of water, it can reduce its reliance on rainfall, which has become increasingly unpredictable in recent years.
Together, these two actions can help Cape Town residents reduce their water usage and ensure a more reliable supply of water for the city.
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12. A new colony of bacteria become more resistant to antibiotics. This happens through natural selection because a few of the bacteria population have traits that make them stronger than the others. This is an example of:
A novel bacterial colony develops antibiotic resistance. Due to a handful of the bacteria population's features making them stronger than the others, this occurs naturally. One illustration of antibiotic resistance is this.
Antibiotic usage is the primary contributor to antibiotic resistance. While some bacteria die when humans take antibiotics, resistant bacteria can live and even proliferate. Antibiotic usage increases the prevalence of microorganisms with resistance. Bacteria have a greater probability of developing antibiotic resistance the more often we use antibiotics.
Bacteria can evolve antibiotic resistance through mutation and selection. For instance, although some bacteria have evolved to create enzymes to inactivate antibiotics, others have built biochemical "pumps" that may remove an antibiotic before it reaches its target.
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Describe how a streams rate of erosion and deposition are related to its gradient
Answer:
Explanation:
High gradient stream has the highest erosion and least deposition
low gradient streams have most deposition and least erosion
Which abbreviation could be used to represent a heterozygous genotype?
B) T_ abbreviation(s) could be used to represent a heterozygous genotype
An organism's genotype is made up of all of its genetic components. The term "genotype" can also be used to describe the alleles or genetic variations that a person possesses in a certain gene or genetic region.
The ploidy, or number of copies of each chromosome, found in that species, determines how many alleles a person can have for a given gene. In diploid organisms like humans, there are two complete sets of chromosomes, which means that each person has two alleles for each gene. Homozygous refers to a genotype when both alleles are the same. Heterozygous refers to a genotype when there are two distinct alleles.
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Full Question: Which abbreviation(s) could be used to represent a heterozygous genotype? O A) Tt B) T_ O C) TT O D) A or
B O E) Bor C
PLEASE HELP!!!!!!!!!!
acceleration is a change in velocity over a specific amount of time. So there are 2 measurements of speed.
The unit for force is____
The unit for mass is____
The unit for acceleration is____
The unit for force is Newtons (N).
The unit for mass is kilograms (kg).
The unit for acceleration is meters per second squared (m/s²).
What is force?
Force is a physical quantity that describes the interaction between two objects, and is measured in Newtons (N). Force can cause a change in an object's motion, which means that a force can cause an object to accelerate, decelerate, or change direction.
Mass, on the other hand, is a measure of the amount of matter in an object. It is typically measured in kilograms (kg). Mass is a scalar quantity, which means that it has magnitude but no direction. The mass of an object is a measure of the amount of inertia it possesses, or its resistance to a change in motion.
Acceleration is the rate at which an object's velocity changes over time. It is measured in units of meters per second squared (m/s^2), which means that for every second that passes, the object's speed changes by a certain amount.
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Why do cells need glucose?
Can someone a sweater this question ASAP for me please?
Which of the primary effects of habitat fragmentation would most harm an animals ability to hunt for food?
Animal mobility is hampered by fragmentation. As individuals have difficulty crossing habitat patches, inbreeding may increase and genetic diversity may be lost.
The ecological impacts of fragmentation, including habitat loss and reduced diversity of plant and animal species, are known to be detrimental primarily to all taxa. The ability of 4,444 species to adapt to changing environments is impaired by habitat fragmentation, which also threatens the size of species populations. This occurs at the genetic level in small populations due to interruption of gene flow from one generation to the next.
The Indian Elephant is the example of endangered species list due to habitat degradation.
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Hannah rescued an injured dog when she was on a road trip. Which veterinarian can help her in this situation?
A. a veterinarian who is into education
B. a veterinarian who works at an aquarium
C. a veterinarian who works in the food industry
D. a veterinarian who cares for laboratory animals
E. a veterinarian who specializes in shelter medicine
The veterinarian that can help Hannah in this situation is a veterinarian who specializes in shelter medicine.
The correct option is E.
Which veterinarian will help Hannah?Shelter veterinarians are trained to provide medical care for animals that have been rescued from the streets or are in a shelter.
They are experienced in handling and treating animals that have been injured or are in critical condition. They can diagnose the dog's injuries and provide appropriate treatment to help the dog recover.
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state how the protein and energy requirements of the following will differ from those of a 16 year old female who does not take much exercise (1)An elderly person (2) a 2 year old child (3) a pregnant women (4) a male athlete
The protein and energy requirements of an individual can vary depending on factors such as age, physical activity, health status, and physiological condition such as pregnancy.
What is protein?Proteins are complex macromolecules composed of long chains of amino acids that play many important roles in the body. They are essential for building and repairing tissues, such as muscle, bone, skin, and hair, and also serve as enzymes, hormones, and antibodies. Proteins are also important for the transport and storage of molecules within cells, and they help to regulate many cellular processes. There are 20 different types of amino acids that can be combined in different ways to create a wide variety of proteins. Each amino acid has a unique side chain, which gives it different chemical properties. When amino acids are linked together in a specific sequence, they form a polypeptide chain, which can then fold into a specific three-dimensional structure to form a functional protein.
Here,
Here are some ways in which the protein and energy requirements of the following groups differ from those of a 16 year old female who does not take much exercise:
Elderly person: As we age, our bodies become less efficient at using protein, and we may also experience a decrease in appetite and muscle mass. Therefore, elderly people may require more protein per kilogram of body weight than younger adults. They may also need fewer calories overall, due to a decrease in metabolic rate and physical activity. Additionally, the protein should be high quality and easily digestible to promote muscle maintenance and repair.
2-year-old child: Children have higher protein and energy needs per kilogram of body weight than adults because they are still growing and developing. Protein is essential for building and repairing tissues, including muscle, bone, and organs. Children also require more energy to support their rapid growth and development. However, it's important to ensure that the protein is from healthy sources such as dairy, lean meats, and legumes, and that the child's overall diet is balanced and nutritious.
Pregnant woman: During pregnancy, the body requires additional protein and energy to support the growth and development of the fetus, as well as the mother's increased metabolic rate and changes in body composition. Pregnant women require an additional 25 grams of protein per day compared to non-pregnant women, and should also consume more calories overall. The protein should be from a variety of sources, including lean meats, dairy, legumes, and nuts, and should be consumed throughout the day to support fetal growth and development.
Male athlete: Athletes who engage in intense physical activity require more protein and energy to support muscle growth and repair, as well as increased metabolic demands. The exact requirements will depend on the type and duration of activity, as well as the athlete's body composition and goals. However, athletes typically require more protein per kilogram of body weight than sedentary individuals, and may also need to consume more calories overall to support their energy needs. It's important to ensure that the protein is from high-quality sources and is consumed in sufficient quantities throughout the day to support muscle repair and growth.
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1. _______ are thought to have been present before vertebrates.
2. Cladograms are graphic representations of evolutionary history, which is called _______. They are sometimes referred to as phylogenetic trees.
3. Each node, or intersection, on a cladogram represents a/n _______ between two species.
4. Traits, or characteristics, that organisms develop and are passed down to become new species are called _______ traits.
5. Traits or structures that likely developed from common ancestors are called _______ structures.
6. Traits or structures that have a similar function, or job, but are not shared due to common ancestry are called _______ structures.
7. Primates are a group of animals that have developed many adaptations such as larger brains, binocular vision and _______ thumbs that support arboreal life.
8. New World monkeys differ from Old World monkeys because they have _______ which act as additional hands when living in the trees.
9. _______ is an early australopithecine skeleton, found in 1974.
10. Homo _______ is not thought to have evolved into Homo sapiens. The two are now thought to have been present at the same time as sister species.
11. Describe how scientists use comparative anatomy when building cladograms.
Answer:
Invertebrates are thought to have been present before vertebrates.
Cladograms are graphic representations of evolutionary history, which is called phylogeny. They are sometimes referred to as phylogenetic trees.
Each node, or intersection, on a cladogram represents a common ancestor between two species.
Traits, or characteristics, that organisms develop and are passed down to become new species are called acquired traits.
Traits or structures that likely developed from common ancestors are called homologous structures.
Traits or structures that have a similar function, or job, but are not shared due to common ancestry are called analogous structures.
Primates are a group of animals that have developed many adaptations such as larger brains, binocular vision and opposable thumbs that support arboreal life.
New World monkeys differ from Old World monkeys because they have prehensile tails which act as additional hands when living in the trees.
Lucy is an early australopithecine skeleton, found in 1974.
Homo neanderthalensis is not thought to have evolved into Homo sapiens. The two are now thought to have been present at the same time as sister species.
Scientists use comparative anatomy to identify homologous structures, or traits that are shared due to a common ancestor, among different species. By comparing these structures across many different species, scientists can build cladograms that show the evolutionary relationships between them.
which are geological evidence of panngaea
Since there is no options (like A,B,C, or D)
I hope this can help you
There are several geological pieces of evidence that support the existence of the supercontinent Pangaea. Some of these include:
Fossil Evidence: The fossils of certain plant and animal species have been found on continents that are now separated by vast oceans. For example, the reptile Mesosaurus, whose fossils have been found in South America and Africa, indicates that these two continents were once connected.
Mountain Belts: The Appalachian Mountains in North America are part of a larger mountain belt that extends into Europe and Africa. The similarity of the rock types, structures, and ages of the Appalachian Mountains and those in other continents is consistent with the idea of Pangaea.
Glacial Evidence: Glacial deposits from the late Paleozoic Era, such as tillites and dropstones, have been found in areas that are now widely separated. These deposits indicate that a large ice sheet covered the southern polar region and that the continents were once joined together in a single landmass.
Paleoclimatic Evidence: The distribution of certain sedimentary rocks, such as coal deposits, suggests that the climate was once much warmer in areas that are now located far from the equator. This is consistent with the idea that the continents were once joined together and that the distribution of land masses influenced global climate patterns.
These are just a few examples of the geological evidence that supports the idea of Pangaea.
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q3.6. some students have the misconception that during cellular respiration, the matter in glucose is somehow turned into energy. consider that when we exercise, we burn glucose and also lose mass. why does this happen?
When we exercise, we lose the potential energy that is held in glucose by our cells, which decreases our mass. Despite the initial high energy consumption, both proteins and fats can provide energy.
What kind of breakdown occurs when glucose is converted into chemical energy that the cells use to function?A sequence of chemical processes known as cellular respiration convert glucose into ATP, which can then be used as energy for a variety of bodily functions. Glycolysis, the citric acid cycle, and oxidative phosphorylation are the three basic processes that take place during cellular respiration.
Uses energy during cellular respiration?The catch is that your cells' cellular respiration is a biological activity. Energy in the form of ATP is required for biochemical reactions.
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An example of a symbiotic relationship is found between the clown fish and the sea anemone. The sea anemone provides protection for the fish and the fish provides food for the sea anemone. What category best describes this relationship?
The relationship which best describes the category of the symbiotic relationship between the clown fish and the sea anemone is called Mutualism.
Mutualism refers to a symbiotic connection in which both partners gain. For example, consider the clownfish and sea anemone connection. When a clownfish and a sea anemone hook up, both species rely on one other to survive. The clownfish requires shelter from predators, thus it relies on sea anemones.
Sea anemones, on the other hand, must survive on food provided by clownfish (faeces). The two species benefit from one another. Their collaboration is hence referred to as a mutualistic connection. The symbiotic interaction is known as commensalism, and it occurs when one species benefits while the other species suffers no harm. In other words, one partner earns while the other suffers no harm.
Parasitism refers to a symbiotic connection in which one species (the parasite) benefits while the other species (the host) suffers.
One partner profits while others suffer. Parasites include mosquitoes, mistletoe, roundworms, and all of the viruses, ticks, and protozoa that cause malaria. Amensalism is defined as any interaction between organisms of different species in which one organism stays unaffected while the other is suppressed or eliminated.
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Binomial nomenclature is a 2-name naming system based on
Binomial nomenclature is a two-name naming system based on the species name and the genus name.
What is the Binomial nomenclature?Binomial nomenclature is a system of naming living organisms that was developed by the Swedish botanist Carl Linnaeus in the 18th century.
This system uses a two-part scientific name to identify each species, consisting of the genus name (written first and capitalized) and the species name (written second and in lowercase).
For example, humans are classified as Homo sapiens, where "Homo" is the genus name and "sapiens" is the species name.
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humans cut down a forest to build a mall. which population has adaptations that make it most likely to survive
The organism that is most likely to survive the destruction of the forest caused by humans building a mall is the black rat.
The black rat has several adaptations that make it particularly well suited to survive in a variety of habitats and to thrive when humans are present. It is an excellent climber and can easily scale walls and other structures to find food, shelter, and nesting sites. It is also an omnivore, which means it can eat a wide variety of food sources, including human trash.
Furthermore, black rats are quite resilient and can tolerate a wide range of temperatures, making them more likely to survive in an urban environment.
Finally, they reproduce quickly, meaning that if the original population survives, it can quickly repopulate the area. All of these adaptations make the black rat the population most likely to survive the destruction of the forest caused by humans building a mall.
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In humans, normal vision is completely dominant (N) and myopia (nearsightedness) is recessive (n). A homozygous normal female marries a myopic male. What would be the genotypes and phenotypes of the offspring?
80 POINTS!
Please help!
1)
Starting from the sun, create a food chain including at least three organisms. Explain how energy is transferred through the chain.
2)
Describe one path carbon can take through the environment (through the systems and bodies of living things and back in our land, oceans, and atmosphere). Be sure to include at least five specific places that the carbon atom can be found as it makes its cycle.
Answer: Sun → Grass → Rabbit → Fox
1. In this food chain, the sun provides energy to the grass through photosynthesis. The grass is then eaten by the rabbit, which in turn is eaten by the fox. As each organism eats the one below it in the chain, energy is transferred from one organism to the next.
2. Carbon is found in many places in the environment and cycles through various systems and bodies of living things. One path carbon can take is:
Carbon in the atmosphere is absorbed by plants through photosynthesis.
Carbon is stored in plants and transferred to animals that eat the plants.
Carbon is released into the atmosphere through respiration by plants and animals.
Dead organisms and waste products decompose and release carbon into the soil or water.
Carbon in the soil or water can be taken up by plants and the cycle repeats.
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the link below shows the plasmodium life cycle.
Explain in your own words how this disease can be spread among people
Answer:
breathing
Explanation:
this disease can be spread among people through breathing
What are two benefits of oyster farms
Answer:
Shellfish beds stabilize sediments, helping to protect the shoreline from erosion and storms. Oyster reefs can sequester carbon and protect surrounding habitats like salt marshes from erosion, aiding carbon sequestration in these habitats.
Explanation:
18. How does contact metamorphism relate to plate tectonics?
O A. Contact metamorphism causes earthquakes, which is the driving force behind plate motion.
OB.
Contact metamorphism occurs along the margins of magma bodies, which occur in great numbers at
subduction and rifting zones.
OC. Plate motions cause earthquakes, which are the driving force behind contact metamorphism
Contact metamorphism occurs along the margins of magma bodies, which occur primarily in
OD.
continent-continent collision zones.
The answer is B. Contact metamorphism occurs along the margins of magma bodies, which occur in great numbers at subduction and rifting zones, and subduction and rifting zones are directly related to plate tectonics.
Contact metamorphism occurs when rocks are altered by heat and/or pressure from nearby intrusions of magma. These intrusions often occur at subduction zones and divergent boundaries, which are part of the larger system of plate tectonics. Subduction zones occur where one tectonic plate is forced beneath another, and divergent boundaries occur where two plates are moving away from each other. The process of plate tectonics is responsible for the formation of these boundaries and the associated geological processes, such as contact metamorphism.
Therefore, contact metamorphism is directly related to plate tectonics.
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Describe the circulatory system of the squid. Is this open or closed and how does it work?
Due to the closed circulatory system that squids and humans share, all of their blood is kept in a system of blood vessels (arteries, veins, and capillaries).
The circulatory system of a squid is it open or closed?The heart pumps blood into arteries and veins, allowing it to circulate through the body inside the closed circulatory system, in all vertebrates and some invertebrates (such as octopuses and squids).
How does a squid's circulatory system function?Squids have three hearts, two of which are branchial and one of which is systemic. Blood is pumped by the branchial hearts to the gills, where oxygen is absorbed. The systemic heart is where the blood is subsequently circulated to the rest of the body.
A squid breathes in what ways?In addition to taking in oxygen via their gills, squid is assumed to get a significant amount of their oxygen through simple diffusion through their skin.
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Bonjour est-ce que vous pouvez m’aider pour mon exercice en svt svp merci !!
La drépanocytose est une maladie génétique causée par la mutation d'un gène qui code
l'hémoglobine. Ce gène existe sous deux versions, l'allèle A normal et l'allèle S muté.
Lorsqu'un individu possède deux exemplaires de l'allèle S, il est malade: il est atteint, entre
autres, d'une anémie importante.
Certains individus sains possèdent un exemplaire de chaque allèle: on dit qu'ils sont
hétérozygotes pour ce gène. Cette particularité leur confère une résistance au paludisme.
Globule rouge en
forme de faucille
Globule rouge normal
35 μm
MO
1 Globules rouges d'un individu hétérozygote
pour le gène de l'hémoglobine. Lorsque les
globules rouges sont déformés, le Plasmodium n'est
plus capable de les infecter.
-Fréquence de l'allèle S
1 à 5%
5 à 10%
10 à 15 %
15 à 20 %
-Océan Atlantique
Distribution du Plasmodium
-2 Carte de la fréquence de l'allèle S et de la
présence du Plasmodium en Afrique.
Proposer une explication à la fréquence élevée
de l'allèle S dans des populations humaines
Answer:
La persistance de l'allèle faucille à haute fréquence dans une population est un cas de polymorphisme équilibré. Le polymorphisme équilibré est une situation où deux allèles atteignent l'équilibre parce que l'hétérozygote est plus apte que l'un des homozygotes. Dans la drépanocytose, cela se produit parce que les personnes homozygotes pour l'allèle de la drépanocytose sont gravement anémiques tandis que les personnes homozygotes pour l'hémoglobine de type sauvage sont plus sensibles au paludisme.
C'est ma pensée sur la question
Suppose a person is 80 years old and that puberty took place when he or she was 12 years old. a. Calculate the percentage of the person's life that he or she spent in each of the four stages of development that follow birth. b. Make a bar graph showing the percentage for each stage.
PLS HELP ITS DUE AT 11PM ITS ALMOST 11
80 years is the whole lifespan, multiplied by 100. Childhood and infancy: (12/80) x 100 = 15%. Teenagers: (8/80) times 100 is 10%. Adulthood: (56.25%) (45/80) times 100. Old age: (15/80) x 100 = 18.75%
What is the average human lifespan?This is known as the "maximum life span," which is the maximum length of time any human has ever been known to have lived. According to a theoretical analysis, there are restrictions on the maximum life expectancy at birth.
What is class 10 life span?The period from conception to natural death is considered a person's life span. An organism's life span is a hypothetical number that represents how many years it will survive. The average can be used to estimate it.
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how do the products of glycolysis and the krebs cycle relate to the electron transport chain? multiple choice glycolysis and the krebs cycle produce the molecules that shuttle electrons to the electron transport chain. glycolysis and the krebs cycle produce co2, which binds to electrons in the electron transport chain. glycolysis and the krebs cycle are the final receptors for electrons that flow through the electron transport chain. glycolysis and the krebs cycle use co2, which is produced in the electron transport chain. glycolysis and the krebs cycle produce the atp necessary to start the electron transport chain.
The products of glycolysis and the Krebs cycle relate to the electron transport chain glycolysis and the Krebs cycle produce the molecules that shuttle electrons to the electron transport chain.
Glycolysis and the Krebs cycle are both metabolic pathways that occur in the cytoplasm and mitochondria of cells, respectively. Glycolysis breaks down glucose into pyruvate, generating a small amount of ATP and NADH. The Krebs cycle further oxidizes pyruvate to generate more NADH and FADH2, as well as some ATP and CO2.
The NADH and FADH2 molecules produced by both pathways carry high-energy electrons that are eventually passed on to the electron transport chain, located in the inner mitochondrial membrane.
The electron transport chain uses these high-energy electrons to pump protons across the membrane, creating a proton gradient that drives the synthesis of ATP via oxidative phosphorylation. Thus, the molecules produced by glycolysis and the Krebs cycle are crucial in delivering electrons to the electron transport chain, which ultimately leads to the production of ATP.
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The images show fossils of a modern bird and two extinct organisms (a Tyrannosaurus rex and an Archaeopteryx). Based on the structure of the three organisms, it can be concluded that
. The Archaeopteryx and bird have wings, while dinosaurs have limbs. So, it can be concluded that
.
Answer: They have a common ancestor
Explanation:
If they have homologous structures then it is very likely that they evolved from a common ancestor.
The relationship between chromosome chromatinod and DNA
Chromosomes are made of DNA and histone proteins, organized into chromatin, which regulates gene expression through different compaction states.
Chromosomes are structures inside cells that contain hereditary material as DNA atoms. DNA is firmly pressed and coordinated with proteins called histones to shape chromatin, which makes up the construction of chromosomes. Chromatin can exist in various conditions of compaction, influencing how qualities are communicated. For instance, when chromatin is firmly pressed, qualities might be less open and less inclined to be communicated. Then again, when chromatin is less conservative, qualities might be more open and bound to be communicated. By and large, the connection between chromosomes, chromatin, and DNA is basic to the guideline of quality articulation and the transmission of hereditary data starting with one age then onto the next.
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Here are some key points about the relationship between chromosomes, chromatin, and DNA:
Chromosomes are thread-like structures found in the nucleus of a cell that contain DNA.DNA is the genetic material that carries the instructions for the development, function, and reproduction of all living organisms.Chromosomes are composed of DNA and proteins, primarily histones, which help package and organize the DNA into a compact and manageable structure.Chromatin is the complex of DNA and proteins that make up chromosomes.In the nucleus of a cell, chromatin is found in two forms: heterochromatin, which is tightly packed and generally inactive, and euchromatin, which is loosely packed and generally active.DNA is organized into units called genes, which are segments of DNA that contain the information for making specific proteins.Chromosomes are inherited from one generation to the next and are responsible for passing on genetic traits from parents to offspring.Changes in the structure or number of chromosomes can lead to genetic disorders or diseases.Advances in genetics and genomics have enabled scientists to study the relationship between DNA, chromatin, and chromosomes in more detail, leading to a better understanding of how genetic information is stored, expressed, and transmitted.