Answers
How the first living things changed the Earth system
Age of the oldest rocks and fossils
Modern living things might be like the first living things
Scientists who study rock layers, fossils, and Earth's history
Related Questions
BRAINLY, THIS IS AN ACADEMIC STUDY ON NATURAL SELECTION, NOT A TEST!!!
Answers
Answer:
A. The wild population, because it is more likely to contain some plants that are resistant to the fungus.
The genetic diversity of the wild population means that there is a higher likelihood that at least some of the plants will have natural resistance to the fungus. This means that even if the fungus is harmful to most of the plants, the resistant plants will survive and reproduce, passing on their resistance to future generations. In contrast, the crop population, which has lower genetic diversity, is more susceptible to being wiped out entirely by the fungus.
Answer:
A
Explanation:
the more variations, the more options, and therefore the higher the chance that they include some to fight a threat.
this also happened with the human race and e.g. the bubonic plaque and also with the cold, the flu and Covid.
only people with certain genetic markers survived and then reproduced.
if for some reason the bubonic plaque would break out again, and we would not have the antibiotics against it, still it would kill much less of the population than back in medieval times, as we all are descendents from the survivors back then (and carrying mostly their genetic markers) .
and because of the natural selection during the Spanish flu pandemic, the flu and Covid (as a close relative to flu and cold) are today mostly an annoyance and not a deadly threat to the general population. all of them still kill a lot of people, don't get me wrong, but it is still a tiny fraction of the population.
when the western civilization brought the common cold to the Inuit ("Eskimos"), it almost annihilated them completely, as they were not used to such a virus. but luckily at least some of them had the necessary genetic markers, and so they survived. and today it is the same "annoyance" to them as it is to the rest of the world
Covid only got the big headlines, because it killed more than the usual "share" from the risk groups (old and already sick), and concentrated its "efforts" on complex lung infections but also blood infections that caused a dangerous drop of oxygen levels in the blood, which caused the higher than usual hospitalization rates.
immunization by vaccination helped a lot with flu and Covid, but that does not (or very little) help with the natural immunization of future generations, because still everybody reproduces, and not just the ones with the necessary genetic markers to defeat these infections.
Explain the existence of oxygen gas on the early earth.
Answers
Most scientists concur that oxygen was likely fermenting in the oceans as a result of cyanobacterial photosynthesis so early as 3 billion years ago, even if it was missing in the atmosphere at the time.
Was there oxygen gas on the early Earth?The early Earth was insulated and kept warm at a crucial stage of its development by the greenhouse gases, water vapour, carbon dioxide, and methane. The early atmosphere, however, only included a very little amount of oxygen.
Why is it significant that oxygen gas is becoming more prevalent on early Earth?As a result, the oxygen given off by cyanobacteria changed the make-up of a earth's atmosphere, brought about the development of aerobic metabolism, it ultimately facilitated the advent of multicellularity. Oxygen is the primary component on today's Earth, which is much kinder and more beautiful than the early Earth.
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You complete an experiment measuring the spread of the Cordyceps fungus across a forest environment. You measure the amount of growths you observe on the ground in a 1 acre area. After evaluating your experiment, you find that fungus frequently grows long fibers underground and only sprout reproductive parts above ground. How might this affect your data and/or conclusion?
Answers
The correct answers is that the initial conclusion of the experiment is incorrect since the statistics do not account for subsurface development and the true area of fungus spread may be larger.
What do fungi do?Although there is rising support for separating fungi and other microorganisms into a separate kingdom, fungi are typically categorised as plants. Due to this, fungi are most appropriately characterized as microbes that resemble plants but lack chlorophyll.
What does fungus do to a person's body?Any illness or condition brought on by a fungus is referred to as a fungal infection. They often impact your skin, hair, nails, or mucous membranes, but they can also spread to other parts of your body, including your lungs. In the event that your immune system is compromised, you are more susceptible to fungal infections.
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Who is most likely to experience a decrease in their immune system?
a. Marco, who is beginning his first serious relationship.
b. Beatriz, who is starting a new high-profile job.
c. Deshaun, who is in the midst of final exams week.
d. Jules, who is in training to compete in her first triathlon.
Answers
Answer:
The person who is most likely to experience a decrease in their immune system is option c, Deshaun, who is in the midst of final exams week. Stress, such as that experienced during exam week, has been shown to have a negative impact on the immune system. Stress hormones, such as cortisol, can suppress the immune system's ability to fight off infection and disease. While the other options may also experience some stress, final exams are a particularly stressful time for many students and can lead to a temporary decrease in immune system function.
what is the pH of a solution that contains 1 x 10^-3M H3O+?
Answers
The pH οf the sοlutiοn is 3. pH is an impοrtant prοperty οf sοlutiοns in many scientific and technical fields, including chemistry, biοlοgy, envirοnmental science, and engineering.
What is pH?pH is a measure οf the acidity οr basicity οf a sοlutiοn, defined as the negative lοgarithm (base 10) οf the cοncentratiοn οf hydrοgen iοns (H+) in mοles per liter (M) οf the sοlutiοn. The pH scale ranges frοm 0 tο 14, with a pH οf 7 being neutral, pH values less than 7 indicating acidity, and pH values greater than 7 indicating basicity. A change οf οne pH unit represents a tenfοld change in the cοncentratiοn οf hydrοgen iοns.
The pH οf a sοlutiοn can have impοrtant effects οn chemical and biοlοgical prοcesses. Fοr example, enzymes and οther biοlοgical mοlecules are sensitive tο changes in pH, and can οnly functiοn within a narrοw range οf pH values.
The pH οf a sοlutiοn that cοntains 1 x 10⁻³ M H3O+ can be fοund using the fοllοwing fοrmula:
pH = -lοg[H3O+]
where [H3O+] is the cοncentratiοn οf the hydrοnium iοn in mοles per liter (M).
Substituting the given value οf [H3O+] = 1 x 10⁻³ M intο the equatiοn, we get:
pH = [-lοg(1 x 10⁻³) = 3
Therefοre, the pH οf the sοlutiοn is 3.
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5. Every human action affects the environment.
A. What are four impacts caused by the current growth rate of humans? (8 points)
B. How do each of these impacts affect the environment? (12 points)
Answers
Answer:
A. The current growth rate of humans has several impacts on the environment, including:
Deforestation: the clearing of forests for agriculture, urbanization, and logging.
Climate change: the alteration of the Earth's climate patterns due to human activities such as burning fossil fuels and deforestation.
Pollution: the release of toxic chemicals and other pollutants into the air, water, and soil by human activities such as industrial production, transportation, and waste disposal.
Loss of biodiversity: the disappearance of plant and animal species due to habitat destruction, pollution, and climate change.
B. Each of these impacts affects the environment in the following ways:
Deforestation leads to loss of habitat for wildlife, soil erosion, decreased water quality, and increased greenhouse gas emissions.
Climate change causes rising sea levels, increased frequency and intensity of extreme weather events such as hurricanes and droughts, and changes in temperature and precipitation patterns that affect ecosystems and agricultural production.
Pollution can harm human health, contaminate food and water supplies, and disrupt ecosystems by poisoning wildlife and reducing the quality of soil and water resources.
Loss of biodiversity reduces the resilience of ecosystems to environmental stressors, limits the availability of natural resources, and decreases the ability of ecosystems to provide services such as pollination, water purification, and climate regulation.
Explanation:
Answer:
A. Air pollution, burning fossil fuels, deforestation, water pollution.
B. Air pollution affects the environment, because air pollution damages crops and trees, when the plant absorbs the carbon dioxide, it absorbs what's in the air also, which has a big impact on the environment. Burning fossil fuels are an impact to the environment because when fossil fuels are burned, it creates large amounts of carbon dioxide that goes into the air, which traps heat into the atmosphere causing global warming. Deforestation is an impact on the environment because so many animals are losing their homes and that can cause endangered species, or possibly even extinction of a species. Water pollution effects the environment because all organisms that are living need water. When the water is polluted, animals, plants, etc, are affected.
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What is the hypothesis? Find the hypothesis in the Research Background
Answers
Your predictions about the results of your investigation are expressed in a hypothesis. It is a speculative solution to your research topic that hasn't been put to the test.
What kind of an assumption is this?Hypothesis Daily exposure to the sun increases levels of satisfaction. In this case, the independent variable and attributed cause is sun exposure. Happiness level is the regression coefficient and the assumed effect.
Is that a hypothesis or a question?Simply expressed, a hypothesis is a descriptive method that also identifies the expected or predicted result of the study. Without a working hypothesis, no scientific experiment or investigation can be carried out.
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1028 ABCD [Source: Examine The low-pressure cell in the sketch is a ... mid-latitude cyclone. tropical depression. coastal low. thermal low. periences
Answers
The low-pressure cell in the sketch is a mid-latitude cyclone.
What is a mid-latitude cyclone?Mid-latitude cyclones, also known as extratropical cyclones or wave cyclones, are large-scale low-pressure systems that form in the middle latitudes of the Earth's atmosphere, typically between 30 and 60 degrees latitude. They are characterized by a counterclockwise circulation in the Northern Hemisphere and a clockwise circulation in the Southern Hemisphere and are often associated with weather fronts, precipitation, and high winds.
The sketch likely shows a mid-latitude cyclone because it includes the characteristic features of such a system, including a low-pressure center, converging winds, and a cold front trailing to the south or east and a warm front trailing to the north or west.
Tropical depressions, coastal lows, and thermal lows are other types of low-pressure systems, but they typically have different characteristics and are found in different regions of the Earth's atmosphere.
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If a hemophilic man and a homozygous nonhemophilic woman have two boys and two girls, will any of the children
be hemophilic? With punnet square
Answers
The haemophilia gene will be present just on X chromosome from haemophiliac father. Yet, the girl's mother also contributes one X chromosome to her.
Is there a 50% probability that a male with haemophilia will have a son who also has the disease?Each father with haemophilia will have carriers in all of his daughters (called obligate carriers). A son born to a carriers has a 50% probability of being hemophilic. A daughter of a carrier does have a 50% probability of becoming a carrier as well.
Who is most susceptible to haemophilia?One of the mainly two kinds of haemophilia is far more common in males than in girls. Haemophilia A is the most common kind of the condition, affecting 1 in 4,000 to 1 in 5,000 males worldwide at birth. Almost 1 in 20,000 newborn men around the world may have haemophilia B.
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In a certain population ,the dominant phenotype of a certain trait occurs 90%?What is the frequency of the dominant allele?
Answers
Given that the dominant phenotype occurs in 90% of the population, we can say that p^2 + 2pq = 0.9 or 9/10.
We can then solve for p:
p^2 + 2pq = 0.9
p^2 + 2p(1-p) = 0.9
p^2 - 2p^2 + 2p = 0.9
-p^2 + 2p = -0.1
p^2 - 2p + 1 = 1.1
(p-1)^2 = 1.1
p-1 = ±sqrt(1.1)
p = 1 ± sqrt(1.1)
Since p is the frequency of the dominant allele, it cannot be greater than 1. Therefore, we take the negative root:
p = 1 - sqrt(1.1)
p = 0.05
So the frequency of the dominant allele is 0.05 or 5%.
intelligence test scores refered to as intelligent quotient or IQ scores are based on characteristics such as verbal skills,abstruct reasoning power, numerical ability and spatial visualization.if plotted on a graph the distribution of IQ scores approximates a normal curve with a mean of about 100. an IQ scores above 115 is considered superior studies of "intellectually gifted" children have generally defined the lower limit of their IQ scores at 140: approximately 1% of the population have IQ scores above this limit.find the standard deviation of this distribution?
please help me!
Answers
The standard deviation of the distribution is given as 17.15
How to find the standard deviationAssuming that the distribution of IQ scores approximates a normal curve with a mean of 100, we can use the information given to find the standard deviation (σ) of the distribution.
First, we know that the IQ scores above 115 are considered superior, which means that the area under the normal curve to the right of 115 is approximately 0.15 (since approximately 15% of the population have IQ scores above 115).
Next, we know that approximately 1% of the population have IQ scores above 140. Since the distribution is assumed to be normal, we can use the properties of the normal distribution to find the z-score corresponding to the 99th percentile (since 99% of the population have IQ scores below 140).
Using a standard normal table or calculator, we find that the z-score corresponding to the 99th percentile is approximately 2.33.
We can then use the formula for z-score:
z = (x - μ) / σ
where z is the z-score, x is the IQ score, μ is the mean IQ score, and σ is the standard deviation of the IQ scores.
Plugging in the values we know, we get:
2.33 = (140 - 100) / σ
Solving for σ, we get:
σ = (140 - 100) / 2.33
σ ≈ 17.15
Therefore, the standard deviation of the IQ scores is approximately 17.15.
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Considering earths early atmosphere included nitrogen methane carbon dioxide and water vapor but NOT oxygen alone this meant that any living organism would have to use which method for creating ATP
Answers
Many anaerobic bacteria exist and are most likely their ancestors. Several organisms used various forms of photosynthesis that didn't result in any free oxygen. Others employed a range of chemical techniques.
What proof is there that glycolysis has been used as a source of energy for a long time?Because glycolysis doesn't require oxygen molecules, it is in fact an old metabolic route. This implies that it persisted even when there was insufficient oxygen in the air. Organisms might have exploited the glycolysis mechanism to produce energy in the decreasing environment.
What is the source of ATP synthesis?The ATP synthase is a mitochondrial enzyme that is found in the inner membrane and is responsible for catalyzing the synthesis of ATP from ADP and phosphate. This reaction is fueled by protons moving across a gradient created by chemical proton-to-electron transfer.
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What do you call the equipment or technology used through to identify the age of this fossil fuels
Answers
Answer:There are three types of fossil fuels which can all be used for energy provision; coal, oil and natural gas. Coal is a solid fossil fuel formed over millions of years by decay of land vegetation. When layers are compacted and heated over time, deposits are turned into coal.
Explanation:
sort the chemical reactions based on whether they absorb or release energy
I'm asking this next to the other people who did because the answer with the most likes is wrong.
Answers
Researchers were able to observe changes in bacterial populations that resulted from mutations. How were the later generations of bacteria different from the original population?
1.) They were 25 percent faster due to having more tails.
2.)They lost the ability to reproduce.
3.) They were 25 percent faster due to having fewer tails.
4.) They required less food to grow and reproduce.
Answers
The correct answer is 3.) They were 25 percent faster due to having fewer tails. As a result of these mutations, the later generations of bacteria had fewer tails, which made them faster than the original population.
What do you mean by the expansion of the bacterial population?Rather than their cell size increasing, bacteria develop by multiplying, which is known as bacterial growth. These bacterial cells multiply exponentially; one cell multiplies into two, then four, then eight, then sixteen, and so on.
What four stages of bacterial growth are there?The four stages of bacterial growth are the lag phase, log phase, stationary phase, and death phase.
What do generation time and doubling time mean?The generation time, also known as the doubling time, is the amount of time needed for a cell to divide into two, or for the number of cells to double. The growth rate increases with the generation time.
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6. The Paleozoic era started 550 million years ago. A. What event marks the beginning of the Paleozoic era? (3 points)
B. What event marks the end of the Paleozoic era? (3 points)
c. What evidence do we have to support these theories? (3 points)
Answers
Answer:
A. The beginning of the Paleozoic era is marked by the Cambrian explosion, which is a rapid diversification of life forms in the oceans.
B. The end of the Paleozoic era is marked by the Permian-Triassic extinction event, which is the largest mass extinction event in Earth's history, resulting in the loss of about 90% of marine species and 70% of terrestrial species.
C. There is fossil evidence that supports both the Cambrian explosion and the Permian-Triassic extinction event. The Cambrian explosion is supported by the sudden appearance of a diverse array of complex animal fossils in the rock record. The Permian-Triassic extinction event is supported by the disappearance of many fossil species in the rock record and the appearance of new species after the extinction event. Additionally, there is geological evidence of climate change, ocean acidification, and volcanic activity associated with the Permian-Triassic extinction event.
Explanation:
Prokaryotes can only be unicellular or single-celled. Eukaryotes can be unicellular or single-celled as well. Can eukaryotes be multicellular? How do you know this?
Answers
Yes, eukaryotes can be multicellular. Multicellularity is actually one of the defining features of eukaryotic organisms.
Explanation:
Eukaryotes are organisms that have a nucleus and other membrane-bound organelles, which allow for greater complexity and specialization within cells. This complexity also allows for the development of multicellularity. Multicellular organisms are composed of many cells that work together to form specialized tissues and organs, allowing for more efficient and effective functioning of the organism as a whole.
Examples of multicellular eukaryotes include animals, plants, fungi, and some protists. These organisms have evolved specialized mechanisms for communication and coordination among cells, such as intercellular signaling pathways and extracellular matrices, which allow them to function as complex, integrated organisms.
Are all people equally susceptible to stress related illnesses ? Aresome people better able to cope with stress than other? What does it say about stress as a cause of illness?
Answers
The vulnerability to stress varies from individual to person. Among the elements that influenced the susceptibility to stress are hereditary vulnerability, coping style, type of personality and social support.
Why are some people more able to manage stress than others?Some people naturally respond and are more sensitive to stress. Some people are more naturally robust to stress than others due to differences in temperament, a set of inborn personality qualities that can be seen as early as infancy. On the other hand, some people may feel more threatened and be less able to handle stress.
Why is it crucial for you to manage stress?Long-term stress can increase your risk for heart disease, obesity, high blood pressure, and depression. Avoiding and managing it can reduce this risk. You can avoid stress or lessen it by making plans in advance. selecting the initial things to complete.
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The moon snail is...
a. a carnivore that uses propodium to plow forward
b. know to live on mud and sand flats
c. a species of abalone
d. a species of cowry
e. choice a & b are correct
f. choice b & c are correct
g. choice a & c are correct
h. choice a & d are correct
Answers
The correct answer is e. The moon snail is a kind of carnivorous sea snail that digs through mud and sand in pursuit of prey using a muscular protrusion called a propodium.
The moon snail is a kind of carnivorous sea snail that digs through mud and sand in pursuit of prey using a muscular protrusion called a propodium. They can frequently be seen in coastal locations on mud and sand flats. As a result, choices a and b are both accurate. The moon snail is not a species of cowry or an abalone, so choices c and d are incorrect. The correct answer is e.
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Lifestyle and well being assignment
Scenario The health promotion team run an annual well-being roadshow, visiting local schools, community centres and health centres to promote many aspects of their work. The roadshows have a theme each year and this year the focus is on the health risks associated with smoking and excessive alcohol consumption and how these can affect sporting performance. You have been asked to produce an information leaflet that will be shared to the presenters at the roadshow to present.
Task 1
You need to prepare information for the general public about the health risks associated with smoking and excessive drinking and how these can affect sporting performance. You need to also explore ways in which people can stop smoking and reduce their alcohol consumption. Can you provide the following information:
• 4 Health risks associated with smoking and the effects of smoking on sports performance. (2C.P6)
• 4 Health risks associated with excessive alcohol consumption and the effects of alcohol consumption on sports performance. (2C.P7)
• What two techniques can someone use to stop smoking and what two techniques can someone use to cut down on excessive alcohol consumption? (2C.P8) Are certain techniques better than others? If so why? (2C.M3)
Evidence you must produce for this task
Information leaflet
Criteria covered by this task:
To achieve the criteria you must show that you are able to:
Unit
Describe four health risks associated with smoking and effects of smoking on sports performance
2C.P6
Describe four health risks associated with excessive alcohol consumption and effects of alcohol consumption on sports performance
2C.P7
Explain two techniques an individual can use to stop smoking, and two techniques to cut down on excessive alcohol consumption
2C.P8
Compare and contrast different techniques used to stop smoking and for cutting down on excessive alcohol consumption
Answers
Answer:
Information Leaflet: Smoking, Alcohol and Sports Performance
Introduction:
Welcome to the health promotion team's well-being roadshow. This year's theme is about the health risks associated with smoking and excessive alcohol consumption and how these can affect sporting performance. In this leaflet, we will provide you with information on the health risks associated with smoking and excessive alcohol consumption, and how they can affect your sports performance. We will also explore ways in which you can stop smoking and reduce your alcohol consumption.
Health Risks Associated with Smoking and its Effects on Sports Performance:
Respiratory Problems: Smoking can cause respiratory problems, such as shortness of breath, coughing, and wheezing, which can hinder your sports performance. Smoking can also cause chronic obstructive pulmonary disease (COPD), which can make it difficult to breathe and reduce your endurance levels.
Cardiovascular Problems: Smoking can cause cardiovascular problems, such as high blood pressure, heart disease, and stroke, which can negatively impact your sports performance. Smoking can also cause reduced blood flow to your muscles, which can lead to muscle fatigue and cramps.
Reduced Lung Function: Smoking can reduce your lung function, which can make it difficult to breathe, particularly during intense exercise. This can affect your endurance and overall sports performance.
Increased Risk of Injuries: Smoking can increase your risk of injuries, such as sprains and strains, due to reduced flexibility and weakened bones.
Health Risks Associated with Excessive Alcohol Consumption and its Effects on Sports Performance:
Dehydration: Excessive alcohol consumption can lead to dehydration, which can negatively impact your sports performance. Dehydration can cause fatigue, muscle cramps, and dizziness, which can affect your endurance and coordination.
Reduced Reaction Time: Alcohol can slow down your reaction time, making it difficult to respond quickly to changes in your environment, such as avoiding an opponent or reacting to a ball.
Increased Risk of Injuries: Excessive alcohol consumption can increase your risk of injuries, such as sprains and strains, due to impaired coordination and reaction time.
Reduced Muscle Growth and Recovery: Alcohol consumption can reduce your muscle growth and recovery, which can hinder your ability to build muscle and recover after a workout.
Techniques to Stop Smoking and Reduce Alcohol Consumption:
Stopping Smoking:
Nicotine Replacement Therapy: This involves using nicotine patches, gum, or lozenges to reduce your withdrawal symptoms and cravings.
Behavioral Therapy: This involves identifying your smoking triggers and developing strategies to overcome them, such as avoiding situations where you usually smoke.
Reducing Alcohol Consumption:
Set a Limit: Set a limit on the number of drinks you will have per week or per occasion.
Alternate with Non-Alcoholic Beverages: Alternate between alcoholic and non-alcoholic beverages to reduce your overall alcohol consumption.
Are Certain Techniques Better Than Others?
Research suggests that combining nicotine replacement therapy with behavioral therapy can increase the chances of successfully quitting smoking. Similarly, setting a limit and alternating between alcoholic and non-alcoholic beverages can be effective strategies for reducing alcohol consumption.
Conclusion:
Smoking and excessive alcohol consumption can have negative effects on your sports performance and overall health. We hope this information has provided you with useful insights on the health risks associated with smoking and excessive alcohol consumption, and ways in which you can stop smoking and reduce your alcohol consumption. Remember, a healthy lifestyle can enhance your sports performance and overall well-being.
Explanation:
______________ is large-scale evolution of new species over time.
Answers
Answer:
Explanation:
macroevolution
While viewing a slide of one-celled bacteria that moved very fast all day and all night, a studen concludes that these cells require a large amount of energy to maintain their activity. What organelles provide this needed energy?
Answers
It is likely that the fast-moving bacteria seen on the slide are using their mitochondria to generate the energy needed for their constant activity.
What is ATP?
ATP stands for Adenosine Triphosphate, which is a molecule that stores and provides energy for many cellular processes in living organisms. It is considered the "energy currency" of the cell.
ATP is made up of three components: adenine, a nitrogen-containing base; ribose, a five-carbon sugar; and three phosphate groups. The energy stored in ATP is found in the bonds between the phosphate groups. When a phosphate group is removed from ATP through a process called hydrolysis, energy is released that can be used by the cell for various functions.
The organelles that provide energy to cells are called mitochondria. They are responsible for producing ATP, the main energy currency of cells, through a process called cellular respiration.
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Carnivorous adaptations of plants mainly compensate for soil that has a relatively low content of A. potassium B. nitrogen C. calcium D. water E. phosphate
explanations of why the answers are
correct/incorrect please
Answers
Explanation:
The correct answer is B. Nitrogen. Plants require nitrogen for growth and development, and carnivorous plants have adapted to obtain nitrogen from the insects they consume. These adaptations allow them to survive in soils with low nitrogen content. A. Potassium is an essential nutrient for plants, but carnivorous plants do not obtain potassium from their prey; instead, they absorb potassium from the soil. C. Calcium is an essential nutrient for plants, but carnivorous plants do not obtain calcium from their prey; instead, they absorb calcium from the soil. D. Water is an essential nutrient for plants, but carnivorous plants do not obtain water from their prey; instead, they absorb water from the soil. E. Phosphate is an essential nutrient for plants, but carnivorous plants do not obtain phosphate from their prey; instead, they absorb phosphate from the soil.
Write a claim stating what impact the disappearance of organism VI will have on the ecosystem.
Answers
Answer:
a possible claim regarding the disappearance of an organism in an ecosystem could be: "The disappearance of organism X will have a significant impact on the ecosystem's food chain, biodiversity, and overall ecological balance."
Explanation:
Why do eukaryotic cells have many DNA molecules while prokaryotic cells have only one?
a. Eukaryotic cells need more organelles to carry out certain functions
or
b. Eukaryotic cells need more input to influence the growth and appearance of plants animals and other creatures.
Answers
Answer:
a
Explanation:
eukaryotic has cell membrane
Which scenario is most likely to cause different changes in allele frequencies in two populations of the same species?
Responses
Drought affects both populations of the species.
Drought affects both populations of the species.
Females in both populations prefer the same traits in males.
Females in both populations prefer the same traits in males.
New predators are introduced to both of the populations.
New predators are introduced to both of the populations.
Predators are present in one population but not in the other.
Answers
Alleles with higher fitness can become more prevalent in the population, leading to microevolution (change in allele frequencies) caused by natural selection.
What accounts for the high allele similarity between two populations of the same species?Several of the same alleles can be found in two populations of the same species, even if the alleles didn't emerge until after the populations had split. Across populations, there is gene flow.
What is the name of the condition where the frequencies of two or more alleles of a gene stay largely stable across time?A population will experience generations of stability in the frequencies of alleles, or gene versions, and genotypes, or collections of alleles, if it is in a state known as Hardy-Weinberg equilibrium.
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Answer:Predators are present in one population but not in the other.
Explanation:
k12 quiz Genetic isolation
5. The atmosphere of early Earth is unlike today's atmosphere.
A. When did oxygen first appear in Earth's early atmosphere? (3 points)
B. What factor caused the appearance of oxygen? (3 points)
C. What is one form of evidence used to support this theory? (4 points)
Answers
Answer:
A. Oxygen first appeared in Earth's early atmosphere about 2.4 billion years ago.
B. The appearance of oxygen was caused by the emergence of photosynthetic organisms, such as cyanobacteria, which began to produce oxygen as a byproduct of photosynthesis.
C. One form of evidence used to support this theory is the presence of banded iron formations in sedimentary rocks. These formations contain layers of iron oxide that were likely deposited as a result of the reaction of iron dissolved in seawater with the oxygen produced by photosynthetic organisms. The presence of these formations suggests that oxygen was not present in Earth's atmosphere before the emergence of photosynthetic organisms.
Explanation:
Describe four key elements of the physical environment that determine which species can
live in a particular area.
Answers
By describing the temperature range, kind of soil, quantity of light, and amount of water that are unique to that area, scientists may pinpoint a biome. These elements help certain species fill specific niches.
What are some illustrations of the physical environment?The physical environment, in which we live and have an impact on one's health, is defined as the exterior surrounds and situations. All the varied elements of nature, such as the air, trees, greenery, lakes, and ocean, are included in the physical environment. The physical environment consists of the land, the air, the water, the plants and animals, the buildings and other infrastructure, as well as all of the natural resources that meet our fundamental requirements and offer potential for social and economic development. For people's physical and mental welfare, a clean, healthy environment is crucial. Environmental elements include air, water, climate, soil, indigenous plants, and landforms. By definition, environmental factors affect daily living and play a substantial role in the health inequalities that occur between various geographical areas.To learn more about physical environment, refer to:
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2 | Page Introduction Twenty percent of the human body is made up of proteins. Proteins are large, complex molecules critical for the normal functioning of body cells. They are essential for the structure, function, and regulation of the body's tissues and organs. Proteins are made up of smaller units called amino acids, which are building blocks of proteins. They are attached to one another by peptide bonds forming a long chain of proteins. SECTION A [20 Marks] 1. Which amino acid is shown in the following diagram? CH3 T + H3N- C- T H A. Proline B. Arginine C. Alanine D. Glycine COO 2. There are 20 essential amino acids of which ten are most critical. Two of the following however are only applicable to diets of infants. Which ones are these? A. Histidine and Arginine B. Alanine and Glycine C. Cystine and Methionine D. Ornithine and Aspartic acid
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Protein accounts for roughly 20% of the human body and is found in every cell. Protein is a Greek term that means "of the highest significance." Proteins are known as the workhorses of life because they offer structure to the body and conduct a wide range of activities.
How can only 20 amino acids account for the very large number of proteins?The human body requires just 21 amino acids to produce all of the proteins it requires to operate and grow. Since amino acids may be ordered in so many various ways, your body can produce thousands of different types of proteins from only 21 amino acids.
Protein is found in every cell of the human body. Protein's fundamental structure is an amino acid chain. Protein is required in your diet to help your body repair and create new cells. Protein is also necessary for the growth and development of children, adolescents, and pregnant women.
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what part of the brain determines if you remember
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The hippocampus and other similar structures in the temporal lobe are thought to perform memory-related tasks, according to the majority of existing research. (The limbic system, a neural network, includes the neighboring hippocampus and amygdala as well.)
What is meant by hippocampus?The intricate brain region known as the hippocampus is buried deep within the temporal lobe. It is crucial for memory and learning. It is a flexible and weak structure that is susceptible to several stimuli damaging it. The hippocampus controls learning, memory encoding, memory consolidation, and spatial navigation as a crucial component of the limbic system. Amnesia, a disorder that hinders someone from creating new memories and recalling the past, can be brought on by damage to the hippocampus. Recent studies have demonstrated that the hippocampus is also involved in controlling mood, and that modifying activity in the ventral portion of the hippocampus can lessen anxiety.To learn more about hippocampus, refer to:
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