How could natural selection have led to the evolution of adaptations such as the parachute-like structure carrying a seed?
The ancestors of the dandelion plant may have shown differences in how well their seeds, which could travel farther, may have had less competition in reaching fertile soil. Maybe that's why they survived better and were able to produce more offspring. Over time, an increasingly higher proportion of individuals in the population would have adapted seed-attached parachute structures for seed dispersal.
What do you mean by natural selection?
In natural selection, those variations in the genotype (the entire complex of genes inherited from both parents) that increase the organism's chances of survival and reproduction are preserved and multiplied from generation to generation at the expense of less advantageous variations. Evolution often occurs as a result of this process. Natural selection can arise from differences in survival, fecundity, developmental rate, mating success, or any other aspect of the life cycle. All these differences lead to natural selection to the extent that they affect the number of offspring an organism leaves behind.To learn more about natural selection, refer to:
brainly.com/question/9830102
#SPJ4
Glucose is a carbohydrate formed by using energy to convert carbon dioxide and water bonded glucose molecules. What type of reaction does this represent?.
Glucose is a carbohydrate formed by using energy from the sun to convert carbon dioxide and water into glucose molecules through a reaction called photosynthesis.
Photosynthesis is the process by which plants use carbon dioxide, water, and energy from the sun to convert it into oxygen and sugar molecules called glucose. Plants use their organelles called chloroplasts to store energy from the sun. Chloroplasts have thylakoid membranes that possess a pigment known as chlorophyll. Chlorophyll is responsible for giving green color to plants.
Photosynthesis can be divided into light-dependent and light-independent reactions. Light-dependent reactions take place in the stroma, the space between thylakoid membranes and chloroplast. It uses light energy from the sun to convert into chemical energy in the form of ATP and NADPH. ATP and NADPH provide energy to assemble sugar molecules, synthesized by photosynthesis, called glucose.
To know more about photosynthesis, refer to the following link:
https://brainly.com/question/19160081
#SPJ4
For which of the following is the number the same in human males and females? a. interruptions in meiotic divisions b. functional gametes produced by meiosis c. meiotic divisions required to produce each gamete d. different cell types produced by meiosis
The answer is functional gametes produced by meiosis.
What is meiosis?
In eukaryotic, sexually reproducing organisms, a process known as meiosis is used to reduce the number of chromosomes in a cell prior to reproduction. These cells are packaged into gametes by numerous species, including eggs and sperm. During reproduction, the gametes may then collide and meld to form a new zygote. The union of two gametes will result in a zygote with the same number of alleles as the parents because the number of alleles was decreased during meiosis. This consists of two copies of each gene in diploid organisms.
To learn more about meiosis here:-
https://brainly.com/question/7002092?referrer=searchResults
#SPJ4
Which term describes the distribution of charges in a water molecule?
O organic
O polar
O even
O negative
Answer: I thonk polar
Explanation:
me is big BRAIN
What organism is always found at the base of the food chain?
Answer:
Plants are always at the base of the food chain.
Hope it helps!
How does an open parachute slow a skydiver’s fall?(1 point)
The parachute increases the force opposing gravity.
The parachute increases the force opposing gravity.
The parachute changes the mass of the skydiver.
The parachute changes the mass of the skydiver.
The parachute pulls the skydiver up.
The parachute pulls the skydiver up.
The parachute weakens the force of gravity.
The parachute weakens the force of gravity.
Answer:
C.
Explanation:
Gravity applies in the same way to all objects. A and B are not correct since all objects fall at the same velocity independent of other factors. Since there is no air, D cannot be correct.
Suppose a person had an accident that severed a small nerve required to move some of the fingers of the right hand. Would you also expect an effect on sensation from those fingers?
An accident that resulted in the severing of a small nerve for moving fingers of the right hand would result in effects on both motor control and sensation.
What are motor nerves?Motor neurons (MNs) are neuronal cells located in the central nervous system (CNS) that control a variety of downstream targets. The existence of MN subtypes that correspond to the characteristics of the targets they innervate is implied by this function. This function infers the existence of MN subtypes matching the identity of the targets they innervate.
More than 500 different skeletal muscles are found in humans, and these muscles can all coordinate precisely in time and space to produce complex movements like walking or grasping. SMEs must maintain the identity of the muscle they innervate in order to guarantee such precise coordination. Over the past 20 years, researchers from all over the world have made significant efforts to clarify several crucial stages of SpMN differentiation.
Therefore, if a nerve is severed, the effect will be seen on both motor nerves and sensory nerves.
Read more about motor nerves here.
https://brainly.com/question/28503811
#SPJ4
water is obtained by plants from the soil solution.the water enters by the process of
Answer: ITS osmosis process
Explanation:
Because Water enters and leaves cells through osmosis, the passive diffusion of water across a membrane. In plants, water always moves from an area of higher water potential to an area of lower water potential.In this process, the cell wall and the cell fluid act as permeable membranes and semi-permeable membranes. The concentration of the cell is more in comparison to the water. So, water enters through the roots by Osmosis Process.
HAVE A NICE DAY.
What is the activity that occurs during the movement of the plates under a volcano. 15 paragraphs pls.
The activities that occur during the movement of the plates under a volcano is the melting of the mantle which rises through the plate.
What is a Volcano?This is referred to as an opening which is present the earth's crust through and is characterized by the escape of substances such as lava, gases etc through it.
Volcanoes have plates which are found under it and experience varying degree of movement as a result of the increase in the temperature and pressure around it.
This leads to the melting of the mantle which is found in the earth crust which then rises through the plate.
Read more about Volcano here https://brainly.com/question/440765
#SPJ1
ond water can contain many types of organisms. which of the following are you most likely to find in a pond water sample?
We are most likely to find protozoa in a pond water sample.
Simple, single-celled organisms known as microorganisms are widespread across the planet. They are mostly made up of fungus, bacteria, protozoa, and members of the plant kingdom. They can only be seen under a microscope as a result. A drop of pond water typically contains thousands of these single-celled organisms.
Pond water typically contains a variety of microorganisms. The bio-film that covers sediments and other hard surfaces is made up of protozoa. They can travel from one place to another thanks to their mobility and capacity to rely less on the flow of water. Amoebas, paramecium, and a handful of ciliates are some of the protozoa that are most frequently found in pond water.
Learn more about protozoa here;
https://brainly.com/question/2937170
#SPJ4
ADH and epinephrine act as hormones when released into the bloodstream and as neurotransmitters when released in synapses between neurons. What is similar about the endocrine glands that produce these two molecules?
Similar about the endocrine glands that produce these two molecules
Fusion of neural and non-neural tissue results in the formation of the pituitary and adrenal glands.
The neurotransmitter effects region of the pituitary gland secretes ADH, and the neurosecretory region of the adrenal gland secretes epinephrine.
By contrasting neurotransmitter effects with those of another class of chemical signals—the hormones generated by the endocrine system—we can better understand the unique properties of neurotransmitters. Target cells affected by hormones are often located far from the hormone-secreting cell. In order to accomplish this "activity at a distance," hormones are released into the bloodstream. Neurotransmitters, however, always act over a considerably smaller area. Transmitters work over distances of less than a micron at numerous synapses when they bind exclusively to receptors on the postsynaptic cell that directly supports the presynaptic terminal.
Other synapses have local neurotransmitter diffusion that modifies the electrical characteristics of several postsynaptic (and occasionally presynaptic) cells close to the presynaptic release sites.
To learn more about Neurotransmitters refer the link:
https://brainly.com/question/28101943
#SPJ4
During the redox reaction in glycolysis (step 6 in Figure 9.9), which molecule acts as the oxidizing agent? The reducing agent?
Organophosphate pesticides work by inhibiting ace tylcholinesterase, the enzyme that breaks down the neurotransmitter acetylcholine. Explain how these toxins would affect EPSPs produced by acetylcholine.
These toxins can prolong the effects of EPSPs because the neurotransmitter can be active for a longer time in the synaptic cleft.
What is organophosphate?A wide range of chemicals known as organophosphate (OP) compounds are utilized in both home and industrial settings. These are some examples of organophosphates:
Malathion, parathion, diazinon, fenthion, dichlorvos, chlorpyrifos, and ethion are insecticides.Soman, sarin, tabun, and VX are nerve gases. Echothiophate and isofluorphate are ophthalmic agents.Trichlorfon is an antihistamine. Tribufos (DEF), merphos is a herbicide. Tricresyl phosphate is an industrial chemical.Therefore, these toxins prolong the effects of EPSPs because the neurotransmitter can be active for a longer time in the synaptic cleft.
Read more about organophosphate, here
https://brainly.com/question/14630749
#SPJ4
which of the following cellular components is considered an endotoxin that is harmless as long as the pathogen remains intact but when released by a lysed cell overstimulates host defenses, which may result in a lethal endotoxic shock?
Lipopolysaccharides is the cellular components which is considered an endotoxin that is harmless as long as the pathogen that remains intact but when they released by a lysed cell overstimulates the host defenses, which may result in the lethal endotoxic shock
A widespread of the infection causing the organ failure and they dangerously low blood pressure. the endotoxic shock is a life-threatening condition caused by the severe localised or system-wide infection that is requires immediate medical attention. the Symptoms include the low blood pressure, the pale and the cool arms and legs, chills, difficulty breathing and the decreased urine output. the Mental confusion and the disorientation may also develop quickly. Emergency treatment may also include the supplemental oxygen, intravenous fluids, and the antibiotics and other medications.
To know more about Lipopolysaccharides visit:
https://brainly.com/question/13282865
#SPJ4
PLEASE HELP ME OUT
is a car a living or non living thing? Explain why
Answer: non living
Explanation:
because it's not alive
The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues.
The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound. The test get progressively faster as it continues until the student reaches their max lap score.
The PACER Test score is combined in the FitnessGram software with scores for muscular strength, endurance, flexibility and body composition to determine whether a student is in the Healthy Fitness Zone™ or the Needs Improvement Zone™.
One or more atoms make up a(n) ____________ and are exemplified by groups of macromolecules known as carbohydrates, proteins, lipids, and nucleic acids.
One or more atoms make up a molecule and are exemplified by groups of macromolecules known as carbohydrates, proteins, lipids, and nucleic acids.
A molecule is formed by the combination or two or more than two atoms. The atoms can be of same type or they may be different. The atoms join together by bonds called covalent bonds that are formed by the sharing of electrons between them. The example of molecule is O₂, CO₂, etc.
Proteins are the polymers of amino acids. These are the most essential component of food required for body-building and repair. The protein can serve various roles like: structural, catalytic, transporters, etc.
To know more about proteins, here
brainly.com/question/2773065
#SPJ4
Which of the following sequences correctly represents the flow of electrons during photosynthesis? a. NADPH → O₂ → CO₂ b. H₂O → NADPH → Calvin cycle c. H₂O → photosystem I → photosystem II d. NADPH → electron transport chain → O₂
Answer:
H²O
Explanation:
because during photosynthesis we need water
In humans, sperm and egg cells are haploid, meaning they contain a total of 23 unpaired chromosomes. the other cells in the body are?
In humans, sperm and egg cells are haploid, meaning they contain a total of 23 unpaired chromosomes. The other cells in the body are diploid.
This is due to the fact that each of our chromosomes is paired up, with one chromosome from each pair coming from each biological parent. Every human cell in the body has 23 pairs of these chromosomes, making our diploid number 46 and our 'haploid' number 23.The male reproductive cell, or gamete, is the sperm. The word "gamete" suggests that the cell is only one half of an entity. A human embryo is created when a sperm and a female gamete, or egg, join. When an organism's cells only have one set of chromosomes, the organism is said to be haploid. All organisms that reproduce sexually are diploid.To learn more about sperm.
brainly.com/question/9735466
#SPJ4
Please come up with a hypothesis based on what you think the effect of gender will be on post-activity heart rates.
A hypothesis based on what you think the effect of gender will be on post-activity heart females have a higher heart rate than men.
The heart's reaction to cardiac illness as well as normal cardiac physiology are both significantly influenced by biological sex. In the face of cardiac disease, women typically have superior cardiac function and survival than men do; however, this advantage gradually diminishes when postmenopausal women are contrasted with age-matched males. Heart disease in animals is similar to what occurs in people. Sex hormones play a crucial role in the sex-based variation in heart function and disease outcome. While testosterone is thought to be harmful to heart health, oestrogen is thought to be cardioprotective.To learn more about heart rate.
brainly.com/question/1155838
#SPJ4
a scientist is researching a newly discovered animal. the scientist finds that the animal reproduces quickly and has many offspring each time it reproduces. which type of organism is it?
The type of organism is r-strategists include insects, mice, and bacteria, Therefore, the newly discovered animal
r-strategists are those who thrive in predictable environments but compete for high-quality resources whereas r-strategists are those who tolerate unpredictable conditions by using a wide variety of resourcesr-strategists is typically reproduce once, but greater allocation to reproduction than growth results in large numbers of offspring r-strategists reproduce more than once but greater allocation to growth than reproduction results in fewer offspringr-strategists have short life span, density-independent mortality, typical of a type III survivorship curve r-strategists have long life span, density-dependent mortality, typical of a type I or II survivorship curveTo know more about r-strategist visit : https://brainly.com/question/12538368
#SPJ4
The pancreas, an organ present in some animals, produces enzymes used elsewhere in the animals’ digestive systems. Describe the type of cell structure(s) that might produce these enzymes
Answer: Rough endoplasmic reticulum and Golgi apparatus
Explanation: The organelles responsible for producing enzymes in the pancreas are the rough endoplasmic reticulum and Golgi apparatus. Pancreas have an increased number of these organelles, compared than other cells. The reason why they have more rough ER and Golgi apparatus is because these organelles are making, sorting and packaging large amounts of enzymes in the form of proteins. These enzymes are secreted by the pancreas to aid in the digestion.
What proportion of the solar energy that reaches the marsh is incorporated into gross primary production? Into net primary production? (A proportion is the same as a percentage divided by 100. Both measures are useful for comparing relative efficiencies across different ecosystems.)
Incorporating 5.8% of solar energy into gross primary production.
The amount of energy transferred from one trophic level to the next is referred to as ecological efficiency. Autotrophic organisms in an ecosystem convert solar energy into organic energy. Thermodynamics states that there is no perfect producer or consumer of energy. This indicates that there is a small amount of energy missing from one trophic level to the next.
Only 10% of the energy in the ecosystem gets moved from one trophic level to the next, and the production ratio varies throughout ecosystems. For instance, grassland produces more gross output than an aquatic system.
To learn more about energy here:-
https://brainly.com/question/11399976?referrer=searchResults
#SPJ4
What anatomical term would you use to refer to the positioning of body parts in relation to the midsagittal plane?
The anatomical term used to refer to the positioning of body parts in relation to the midsagittal plane is Medial and/or lateral.
What is the medial and lateral plane?In anatomy, the medial and lateral planes make reference to toward midline and away from midline of the human body, respectively, in regard to the midsagittal plane.
In conclusion, the anatomical term used to refer to the positioning of body parts in relation to the midsagittal plane is Medial and/or lateral.
Learn more about the medial and lateral plane here:
https://brainly.com/question/12993355
#SPJ1
Give an example of one biotic and one abiotic factor that contribute to yearly fluctuations in the size of the human population.
An example of a biotic factor is disease caused by a pathogen; natural disasters, where earthquakes and floods is abiotic factor that contribute to yearly fluctuations in the size of the human population.
How do biotic and abiotic factors affect population ?The presence of autotrophs, or self-sustaining creatures, such as plants, and the diversity of consumers all have an impact on an ecosystem. Abiotic variables influence organisms' ability to survive and reproduce. Abiotic limiting factors limit population increase.
How can biotic factor affect population size ?Populations. A species' population number in an ecosystem is determined by biotic and abiotic variables. The amount of food accessible to that species and the number of creatures that utilise that food source are examples of biotic variables.
How can abiotic factor affect population size ?Because of population density, some abiotic limiting constraints influence members of a group. Disease, food supply, and increased predation are examples of these factors. Diseases and parasites spread more quickly in larger groups. More people means more competition for the food that is available.
To know more about pathogen visit :
https://brainly.com/question/28148146
#SPJ4
part A
A sample of gold has mass of 38.6 grams and a volume of 2 cm3 what is the density of gold?
Part B
A sample of iron has a mass of 46.8 grams and a volume of 6 cm3 what is the density of iron?
Considering the definition of density, you obtain that:
Part A: the density of gold is 19.3 g/cm³.Part B: the density of iron is 7.8 g/cm³.Definition of densityDensity is defined as the property that allows to measure the amount of mass in a certain volume of a substance.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
It can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Density in this caseIn this case, you know that:
A sample of gold has mass of 38.6 grams and a volume of 2 cm³.A sample of iron has a mass of 46.8 grams and a volume of 6 cm³.Replacing in the definition of density:
Gold: density= 38.6 g÷ 2 cm³Iron: density= 46.8 g÷ 6 cm³Solving:
Gold: density= 19.3 g/cm³Iron: density= 7.8 g/cm³In summary, the density of gold is 19.3 g/cm³ and the density of iron is 7.8 g/cm³.
Learn more about density:
brainly.com/question/952755
brainly.com/question/1462554
#SPJ1
Develop a hypothesis to explain the difference between glucose uptake in red blood cells from 1 S-day-old and 1-month-old guinea pigs. (Think about how glucose gets into cells.)
The hypothesis that explains the difference between glucose uptake in red blood cells from 1 5-day-old and 1-month-old guinea pigs is the Red blood cells are the type of cells created in the body's bone marrow and contain one of the essential pigments called hemoglobin, which carries the respiratory gases throughout the body.
Red blood cells are known to possess glucose transporters or GLUT. GLUT 1 is the most important type of transporter channel that can be controlled by the levels of ATP and AMP in the cells.
It is observed that glucose absorption increases with an increase in the incubation period. The incubation period is when cells have been kept in contact with the radioactive glucose. There is a surge in the absorption in starting, and slowly there was a steady increase with the time.
finally It is observed that 15-day-old guinea pig cells absorb more radioactive glucose as it is always higher in the graph and represented by the red dots. It is almost double the glucose absorption in the case of 1-month-old guinea pig's cells.
to know more about bone marrow click here
brainly.com/question/819753
#SPJ1
you were being followed in the parking lot at the store. what part of the nervous system would immediately activate?
The sympathetic nervous system would immediately get activated in response to the stress.
The sympathetic nervous system is a part of the autonomic nervous system. It can be called an "automatic" nervous system. It helps your body to activate its "fight-or-flight" Response. It gets activated when you are stressed, in danger, or while doing some intense physical activities.
The effects of the sympathetic nervous system include increased heart rate, increased breathing rate, slowed down digestion, and increased eyesight. These effects improve your endurance and strength and help you get out of danger. The system releases neurotransmitters like epinephrine that produce such effects.
Sympathetic effects are kept in balance by the effects of the parasympathetic nervous system. Parasympathetic works opposite to the sympathetic system. While the sympathetic system keeps you on alert, the parasympathetic system promotes your body to relax.
To know more about the sympathetic nervous system, refer to the following system:
https://brainly.com/question/14529583
#SPJ4
PLSSS ANSWER QUICKLY LOTS OF POINTS IF WRONG WILL BE REPORTED
In humans the kidneys control the amount of water, salts and other solutes leaving the body by sieving blood through their millions of twisted tubules. When a person drinks too much water in a short period of time, the kidneys cannot flush it out fast enough and the blood becomes waterlogged. Drawn to regions where the concentration of salt and other dissolved substances is higher, excess water leaves the blood and ultimately enters the cells, which swell like balloons to accommodate it.”
How could the process of osmosis explain this phenomenon? Support your answer with evidence from the text above.
Type your answer in the space below
The process of osmosis is used to explain the phenomenon of water and electrolyte control due to the presence of semipermeable membrane of the nephrons.
What is a kidney?A kidney is the major organ of the urinary system which is double in mammals and are located at the abdomen as a retroperitoneal organ.
The kidney has the following vital functions in the body:
Aids in water and electrolyte balanceAids in the elimination of metabolized drugs from the liver andIt helps in urine formation which contains nitrogenous wastes.The kidney is able to balance water and electrolyte (salts) through the nephrons which are the millions of twisted tubules found in the internal structure of the kidney.
The walls of the nephrons are lined with semipermeable membrane which allows the movement of water from the region of low solute concentration to the region of high solute concentration in the process of osmosis.
Learn more about kidney here:
https://brainly.com/question/28063794
#SPJ1
ASAP Please please Help
1.The rate of photosynthesis can be measured as the volume of oxygen released by a
plant per minute. The number of bubbles of gas released per minute from waterweed is
counted.
a.The gas collected in this experiment is not pure oxygen. Suggest a reason for this.
Answer:
photosynthisis is the rate of reaction of the chloroplasts in the plant. the oxygen is collected from the plant and transformed to oxygen
Explanation:
hope this helps
Photosynthisis is the rate of reaction of the chloroplasts in the plant. the oxygen is collected from the plant and transformed to oxygen.
What happens during cellular function?One of the cellular functions is making food/creating energy. Plant cells do this the best as they have chloroplasts that can turn sunlight, water, and carbon dioxide into glucose and oxygen via photosynthesis.
The relationship between the structures found in cells and functions carried out by cells related to protein formation and transport or the capture, storage, and usage of energy is known as golgi body appratus.
This glucose is then turned into usable energy when it has transported to the mitochondria where it has been turned with oxygen into carbon dioxide and ATP via cellular respiration. The ATP is taken around the cell and distributed to where it is needed via the Golgi apparatus.
Therefore, One of the cellular functions is making food/creating energy. Plant cells do this the best as they have chloroplasts. Photosynthisis is the rate of reaction of the chloroplasts in the plant. the oxygen is collected from the plant and transformed to oxygen.
Learn more about cellular functions on:
https://brainly.com/question/26309470
#SPJ2
9/60
Which of the following are an example of a polysaccharide?
The following are examples of polysaccharide options (a) starch, option(b) chitin and option(d) cellulose.
Carbohydrates called polysaccharides can either be hydrolyzed back into two or more monosaccharides or are composed of more than two monosaccharides.
These crucial biological polymers function in organisms as storage or structural polymers. Glucose monomers make up the storage polysaccharide in plants known as starch. Two structural polymers that give plants support are chitin and cellulose.
The most prevalent type of carbohydrates in food are polysaccharides, often known as polycarbohydrates. They are long-chain polymeric carbohydrates made up of glycosidic connections that connect monosaccharide units. Using amylase enzymes as a catalyst, this carbohydrate can combine with water to create its constituent sugars.
To know more about polysaccharides refer to: https://brainly.com/question/14241111
#SPJ9
Spiders, ticks, horseshoe crabs, and scorpions all have a pair of claw-like appendages near their mouths used for feeding, defense, movement, and/or sensory reception. What are these appendages called?.
'Spiders, ticks, horseshoe crabs, and scorpions all have a pair of claw-like appendages near their mouths used for feeding, defense, movement, and/or sensory reception. These appendages are called chelicerae.
Spiders, ticks, horseshoe crabs, and many arthropods have claw-like appendages called Chelicerae which are used for feeding, defense, and movements. These jointed appendages are present near the mouth of some arthropods including spiders, ticks, and horseshoe crabs. The arthropods due to the presence of these chelicerae are known as the Chelicerata.
The chelicerae appendage consists of a base segment which is called the "paturon", which has the ability to articulate with the cephalothorax and a fang portion that can articulate with the base segment as well. Almost all spiders have the presence of venom glands and are able to inject the venom through openings that are present near the tips of their respective fangs when they are biting prey.
They are also considered to be mouthparts of the arthropod group that includes many varieties of arthropods. They are commonly referred to as "jaws” and may be shaped as either articulated types of fangs or the one that is similar to pincers.
Learn to know more about Chelicerae at
https://brainly.com/question/1542522
#SPJ4