Answers
Evolutive forces change allelic and genotypic frequencies in a population. 3) a- Redish egret population in the US were hunted to near extinction in the early 1900's and the majority of survivors were the dark-feathered morph. 4) a- Bottleneck effect, b- Gene flow, c- Founder effect, d- Natural selection.
What are the evolutive forces?For a population or a species to evolve, it must be submitted to an evolutive force.
Evolutive forces are those that change a population's allelic and genotypic frequencies through generations. Otherwise, the population is in equilibrium.
These forces are,
Natural selectionGene flowGenetic drift (bottleneck-effect and founder effect)Mating systems (random or non-random)
Notice that mutations are not evolutive forces by themselves. They need to be selected by natural selection to cause a change at a population level. However, they are considered to influence evolution.
In the exposed example,
Dark-feathered Reddish egrets ⇒ USWhite-feathered Reddish egrets ⇒ Bahamas3) a- Redish egret population in the US were hunted to near extinction in the early 1900's and the majority of survivors were the dark-feathered morph.
4) a- Bottleneck effect
b- Gene flow
c- Founder effect
d- Natural selection
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Related Questions
Which phrase best describes what happens to the matter in nail polish remover as it evaporates?
it is destroyed
It disappears
it is converted into energy
it changes form
Answers
it changes form phrase best describes what happens to the matter in nail polish remover as it evaporates
What transpires to the substance in nail paint remover when it dries up?Cooling is caused by evaporation. While evaporating, a substance's particles absorb heat energy from its environment and transform into vapour. The low boiling point of acetone is 56 C. Acetone readily evaporates by absorbing heat from our hands when we hold it in our hands.
If nail paint gets on skin, it dries off very quickly. So there is no chemical reaction or change in the substance's identity; rather, liquid nail paint turns into gaseous nail polish. So, this is a bodily alteration.
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Please answer Quickly!!!
Answers
Answer: decrease, increase
Explanation: Coral can live in acidic water, but is less healthy and dense
Inside a cell, there are 30 sodium ions and 20 potassium ions. If the sodium-potassium pump uses two molecules of
ATP, determine how many ions of sodium and potassium will be left inside the cell. Explain your reasoning.
Answers
After the sodium-potassium pump uses two molecules of ATP, there will be 28 sodium ions and 22 potassium ions left inside the cell.
There were 30 sodium ions and 20 potassium ions inside the cell. With the help of the sodium-potassium pump, two cycles of ion exchange can occur, utilizing two molecules of ATP. In the first cycle, three sodium ions are transported out of the cell, and two potassium ions are transported into the cell. As a result, the number of sodium ions decreases by three to 27, and the number of potassium ions increases by two to 22.
In the second cycle, another three sodium ions are transported out of the cell, and two potassium ions are transported into the cell, which results in 24 sodium ions and 24 potassium ions. However, the total number of ions inside the cell is still 48, which is not the same as the initial number. Therefore, one more cycle is required, resulting in 28 sodium ions and 26 potassium ions inside the cell.
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Select the one true statement.
1. Mitochondria direct cell activities by sending instructions to different parts of
a plant cell.
2. Chloroplasts break down sugar to release energy that a plant cell can use.
3. The cell wall makes a plant cell strong and rigid.
Answers
3. The cell wall makes a plant cell strong and rigid.
PLEASE ANSWER ASAP!
The biologist shares his graph showing the results of an experiment that measured the concentration of zooxanthelle of shallow-water coral in picograma per cell.
Answers
The shallow water ecosystem depends on water temperatures below 30°C to maintain the symbiotic relationship between corals and zooxanthelle.
What is the relationship between water temperature and coral reefs?Water temperature has a significant relationship with coral reefs. Coral reefs are composed of tiny marine animals called coral polyps that build a calcium carbonate skeleton.
These animals live in a symbiotic relationship with photosynthetic algae called zooxanthellae, which provide them with food and give the reefs their vibrant colors. However, this relationship is sensitive to changes in water temperature.
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3. A mass spectrometer is used to get information from
(a) Plants
(c) Rocks
(b) Rubber
(d) Concrete
Answers
Answer: Rocks
Explanation:
Darwin's Theory of evolution suggests that fishes evolved into amphibians. If this statement
is assumed to be true, explain why fishes still exist on the planet.
Answers
Answer:
Darwin's theory of evolution does not suggest that one species directly evolves into another species. Instead, it proposes that species can evolve from common ancestors over a long period of time through a process of natural selection. Therefore, the fact that fishes still exist on the planet does not contradict Darwin's theory. Here are some possible reasons why:
Diversification: Fishes have diversified into many different species over time, each adapted to a particular environment and niche. Therefore, the fact that some fishes evolved into amphibians does not mean that all fishes disappeared.Environmental factors: The evolution of fishes into amphibians may have been driven by changes in the environment, such as the availability of water or the development of new predators. However, not all fish species would have been affected equally by these changes, and some may have continued to thrive in their existing habitats.Adaptation: Fishes have evolved many different adaptations that allow them to survive in various environments. Some fish species are well-adapted to living in freshwater, while others are adapted to saltwater or deep-sea environments. These adaptations have allowed fish species to survive and thrive in different ecosystems.Evolutionary time: The evolution of species takes place over a very long period of time, and it is not necessarily a linear or predictable process. Even if some fish species did evolve into amphibians, it is possible that other fish species continued to evolve and diversify in other ways, leading to the continued existence of fish on the planet.In conclusion, the fact that fishes still exist on the planet does not contradict Darwin's theory of evolution. Evolution is a complex and ongoing process, and the survival of different species depends on a variety of factors, including environmental conditions, adaptation, and diversification.
Which label points to the part of chloroplast where chlorophyll molecules are found?
A. 1
B. 2
C. 3
D. 4
Answers
Answer: A I think
Explanation: Sorry if wrong
Chlorophyll molecules are primarily located in thylakoid membranes within chloroplasts. Here, they capture light energy to perform photosynthesis.The correct option is A.
The label that points to the part of the chloroplast where chlorophyll molecules are found is A. 1. These molecules are located in the thylakoid membranes, specifically in the photosystem complexes.
However, within a chloroplast, chlorophyll molecules are primarily found in structures called thylakoids. Thylakoids are flattened sac-like membranes arranged in stacks (grana) inside chloroplasts. Chlorophyll molecules are integral components of the thylakoid membranes where they absorb light energy for photosynthesis. It captures light energy from the sun and uses it to help convert carbon dioxide and water into glucose and oxygen in the photosynthesis process.
Therefor the correct option is A.
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what is the difference between a 1950 food pyramid and a 2000 food pyramid
Answers
The 2000 food pyramid, known as the "MyPyramid" food guide, was a more complex and personalized approach to healthy eating. It was designed to reflect the latest research on nutrition and health, and included six food groups: grains, vegetables, fruits, oils, dairy, and meats and beans. The pyramid was divided into vertical sections, with each section representing a different food group and the width of the sections indicating the proportion of each food group that should be consumed daily.
In addition, the 2000 food pyramid provided guidelines for daily physical activity and emphasized the importance of balancing food intake with exercise to maintain a healthy weight. It also included advice on portion control, moderation, and making healthy food choices within each food group.
Overall, the 2000 food pyramid represented a more comprehensive and individualized approach to healthy eating than the 1950 Basic Four food groups pyramid.
Which term is used to describe the different depth areas of the oceans?
Opedantic zones
O podiatric zones
pelagic zones
Oprehistoric zones
Answers
Answer:
pelagic zones
Explanation:
Can someone help me really fast please? When you give the answer please elaborate don’t just put a few words
Answers
1. We eat to obtain the nutrients and energy our bodies need to function properly.
2. The types of food animals in the ocean eat depend on their species and location.
Why is eating important?Nutrients like carbohydrates, proteins, and fats provide energy, while vitamins and minerals support various bodily processes.
Some animals, like plankton and krill, feed on tiny plants and animals floating in the water. Others, like sharks and dolphins, hunt and eat larger fish and squid. Some ocean animals, like sea turtles, feed on both plants and animals, while others, like whales, consume primarily krill and other small organisms.
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How are folding and faulting similar? How are they different?
Answers
Folding and faulting are similar in that they both involve the deformation of rock layers in response to stress and difference between folding and faulting is the nature of the deformation.
How are folding and faulting similar and different?Folding and faulting are the two processes that occur in the Earth's crust due to tectonic forces. They are similar in that they both involve deformation of rock layers in response to stress, and they can both result in the formation of mountains and other topographic features.
The main difference between folding and faulting is the nature of deformation. Folding occurs when rock layers are bent or curved without breaking. This can result in the formation of large-scale folds, such as synclines and anticlines, which are characterized by downward and upward curves, respectively.
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Compare the average rate at which geothermal and solar energy reach earths surface? As a policy maker in pursuit of solving world energy problems, which one would you pursue?
Answers
Answer:
The average rate at which geothermal and solar energy reach Earth's surface are significantly different.
Geothermal energy is generated from the heat of the Earth's core, and it is estimated that the total power output of geothermal energy is around 44 TW (terawatts). However, only a small fraction of this power, about 3.3%, is estimated to reach the Earth's surface. This means that the average rate at which geothermal energy reaches the Earth's surface is around 1.45 TW.
On the other hand, solar energy is generated from the radiation of the sun, and the total power output of the sun is estimated to be around 386,000 TW. While some of this energy is absorbed by the Earth's atmosphere and reflected back into space, the remaining energy is estimated to be around 174 PW (petawatts). This means that the average rate at which solar energy reaches the Earth's surface is around 174,000 TW.
As a policy maker in pursuit of solving world energy problems, solar energy would be the more viable option, due to its significantly higher rate of energy reaching the Earth's surface. Additionally, solar energy is a renewable resource that does not produce greenhouse gas emissions, making it an environmentally friendly option. Geothermal energy, while also renewable and clean, may not be as easily accessible in all areas and may require significant investment in infrastructure for harnessing its energy.
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I need help ASAP
For this assignment, you will be writing an abstract of a scientific paper. Can someone please summarize this section the picture that I posted in under 250 words
An abstract is a short, concise summary of a scientific study or literature review.
Be sure you summarize each section of the research paper in your abstract.
Keep your abstract under 250 words
Be concise!
Answers
A research paper's or a thesis's complete body is succinctly summarised in an abstract. It is not an extract; it is an original piece. Without additional citation to outside sources or to the original article, an abstract must be totally self-contained and make sense on its own.
What is a scientific study's abstract?It must provide the intended message as it is a succinct summary of the essay. It provides a brief summary of the entire article, conveys its main points, and reveals if it lives up to the reader's expectations. Academic assignments and research papers often include abstracts as important components.
An abstract is one sort of summary, but there are other places in academic writing where summaries are written.
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Describe the texture of the marrow from the beef bone.
Biology question
Answers
Answer: Bone Marrow texture best described as a Thick Beefy Butter
Explanation: Raw Bone Marrow will smell fresh and slightly sweet. When cooked, its aroma deepens considerably to that of roasted fatty beef.
3.2.2 Quiz: Balancing Chemical Reactions
Question 1 of 10
Which statements are true about balancing chemical equations?
Check all that apply.
A. Balancing chemical equations does not involve trial and error.
B. Balancing chemical equations involves trial and error.
C. Atoms that are in only one of the reactants and only one of the
products should be done last.
D. Single atoms should be done last.
Answers
The correct responses are B. Balancing chemical equations involves trial and error and C. Atoms that are in only one of the reactants and only one of the products should be done last.
What is chemical equation?A chemical reaction is symbolically depicted by a chemical equation. The equation displays the reactants, or the substances that undergo a chemical change, on the left side and the products, or the substances that are created as a result of the chemical change, on the right side.
It takes some trial and error to balance chemical equations since the reactants' and products' coefficients need to be changed to make sure that each element has the same amount of atoms on both sides of the equation.
Additionally, since altering their coefficients would only influence one side of the equation and may disturb the equilibrium of the other elements, atoms that are present in just one of the reactants and only one of the products should be handled last. In general, it is preferable to balance the most complicated molecules first, along with those that include many atoms of a single element, before moving on to the smaller molecules and single atoms.
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Can someone help me really fast please? elaborate don’t just put a few words
Answers
Answer:
We eat to gain nutrients for our bodies to function.
Explanation:
Eating is essential to human survival basically if we don't eat we won't be able to do activities and it will cause people to become sluggish. Eating provides the body with nutrients to grow and repair, if you don't eat you won't be able to gain back blood cell counts and it just makes your body work way more slowly than usual. If we didn't eat our bodies would lack the energy to be able to survive and thrive.
Animals in the ocean will eat other animals or plants in the ocean just like land animals. Often times they will eat animals smaller than them or have seaweed and kelp depending on the animal's diets.
the comet that hit jupiter raised fiery plumes large enough to incinerate the ________
Answers
Answer:
The comet ventured too close to Jupiter's mighty gravitational pull two years ago and was pulled apart into a score of large fragments and thousands of small ones. As each fragment hits Jupiter's dense atmosphere, it is stopped as if it had hit a brick wall. In an instant, its initial speed of 130,000 miles per hour is reduced to zero, and practically all of its gigantic kinetic energy is converted to heat -- so much heat that a titanic explosion results. In the case of each of the largest fragments, this is equivalent to 250 million megatons of TNT. (The largest hydrogen bomb ever detonated produced a blast equivalent to about 58 megatons.)
Explanation:
All of the following statements regarding the Kyoto Protocol are true EXCEPT:
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
the treaty set different but specific targets of carbon dioxide reduction for various nations.
the treaty was replaced by the 2016 Paris Agreement.
the protocol was ratified by the United States.
no emission targets were set for developing countries.
Answers
Answer:
c
Explanation:
C) The protocol was ratified by the United States is not true.The Kyoto Protocol was an international agreement adopted in 1997 with the objective of reducing greenhouse gas emissions in order to combat global climate change.
The following statements about the Kyoto Protocol are true:
A) The treaty set different but specific targets of carbon dioxide reduction for various nations.
B) The treaty was replaced by the 2016 Paris Agreement.
D) No emission targets were set for developing countries.
However, the United States did not ratify the Kyoto Protocol, which was a major setback for the treaty's effectiveness.
Answer: 3rd option is not true
Explanation:
The United States did sign the Kyoto Protocol but it never ratified it, meaning it did not formally agree to be bound by its requirements. Therefore, the United States did not participate in the treaty's implementation.
Which of the following did Mendel conclude about patterns of inheritance?
A) An organism inherits one gene in total
B) An organism inherits two genes of a given trait during gamete production
C) Similar forms of genes account for variation in the inherited traits.
D) An organism inherits one gene for each trait
Answers
The following Mendel concluded about patterns of inheritance : C) Similar forms of genes account for variation in the inherited traits.
What did Mendel conclude about patterns of inheritance?Mendel concluded that inheritance is determined by discrete units called genes, which are passed down from parents to offspring in a predictable manner.
He observed that some traits are dominant over others, and that these dominant traits can mask the expression of recessive traits. Mendel also proposed the Law of Segregation, which states that during gamete formation, the two alleles of a gene separate from each other so that each gamete carries only one allele for each gene.
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Answer:
B.
Explanation:
Summers in Earth's Northern Hemisphere are warmest when:
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
the North Pole points toward Polaris, the current north star.
axial precession matches the axial tilt.
axial precession matches the orbital eccentricity.
the North Pole points toward Vega.
Answers
None of the answer choices accurately describe when summers in Earth's Northern Hemisphere are the warmest.
What is Hotness?
In physics, "hotness" is not a term that is used. The concept that is usually referred to in relation to temperature is "thermal energy", which is the total kinetic energy of the particles that make up a substance. When the thermal energy of a substance increases, its temperature also increases, which we perceive as the substance becoming "hotter".
The warmest summers in the Northern Hemisphere occur when the hemisphere is tilted toward the sun and receives the most direct sunlight. This occurs during the summer solstice, which happens around June 20-22 each year. The axial tilt is responsible for the seasons, and the precession of the Earth's axis does not have a significant effect on the timing of the seasons.
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why do chemotherapy has its strongest side effects on the skin and the lining of the digestive tract?
Answers
The skin is particularly vulnerable to the effects of chemotherapy because the skin cells divide rapidly to replace old or damaged cells. Therefore, chemotherapy drugs can cause skin reactions such as rashes, dryness, and sensitivity. In some cases, chemotherapy can also cause more severe skin reactions, such as burns or blisters.
The lining of the digestive tract is also vulnerable to the effects of chemotherapy because the cells there divide rapidly to replace old or damaged cells. Chemotherapy drugs can cause inflammation and damage to the lining of the stomach and intestines, leading to side effects such as nausea, vomiting, diarrhea, and loss of appetite.
In summary, chemotherapy drugs are designed to target rapidly dividing cells, which includes both cancer cells and normal cells in the body that divide rapidly. This can lead to side effects such as skin reactions and digestive tract problems.
Chemotherapy drugs can damage the DNA of normal cells, leading to cell death or dysfunction. When this happens in the skin, it can cause a range of side effects such as rash, dryness, and sensitivity to sunlight. In the digestive tract, chemotherapy can cause inflammation and damage to the lining of the mouth, throat, esophagus, stomach, and intestines, leading to symptoms such as nausea, vomiting, diarrhea, and mouth sores.
While the side effects of chemotherapy can be unpleasant, they are usually temporary and can be managed with medication or supportive care. It's important for patients to communicate any side effects they are experiencing to their healthcare team so that they can be addressed promptly.
Josie notices that it gets dark at night, but is light again every morning when she wakes up. What is actually happening
when it gets lighter in the mornings?
Answers
Which statement best describes how eukaryotic cells are able to replicate such larger amounts of DNA.
Answers
Answer:
D (I think)
Explanation:
A - No, it replicates everything
B - I think it's referring to okazaki fragments (?) which is on the lagging strand so no.
C - No, in interphase they prepare the for meiosis.
D - the only reasonable statement left
How do the
populations in a community depend on
each other?
Answers
There are many distinct ways in which populations in a community are interdependent, and these interdependencies form the cornerstone of the intricate interactions that exist between various species in an ecosystem.
What is population?A population is a collection of people belonging to the same species who coexist and communicate in a certain geographical region. Depending on the species and the habitat it lives in, a population can have anything from a few to millions of members.
Examples of how different groups in a society are interdependent include:
Food webs and chains: In a community, many creatures rely on other organisms for nourishment. For instance, plants are the main providers of the food that feeds herbivores, which are then consumed by carnivores. A food web is formed by the links between several food chains, which is a network of energy flow.
Pollination: To enable fertilization and the development of seeds, many plants rely on pollinators like bees, butterflies, and birds to move pollen from one plant to another.
Decomposition: species that break down dead organic materials, such as bacteria and fungus, recycle nutrients and make them accessible to other species in the ecosystem.
Competition: Within a community, populations may clash for resources like food, water, and space. This rivalry may restrict population expansion and have an impact on how species are distributed throughout an ecosystem.
Symbiotic interactions: In a community where two or more species coexist and are dependent on one another for existence, there are symbiotic interactions between the many populations that make up that community.
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Which statements about renewable and nonrenewable resources are true? Check all that apply.
Answers
There are two types of resources: renewable and nonrenewable. While a nonrenewable resource has a finite supply, a renewable resource can replenish itself at the rate of use.
Wind, timber, and other renewable resources are examples, while coal and natural gas are examples of nonrenewable resources.
Renewable resources are abundant while nonrenewable resources are scarce.
A nonrenewable resource is a natural substance that is not replenished at the rate at which it is consumed. While renewable sources are good for the environment, they also pollute.
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A sample of helium gas has a volume of 6.5 L at a pressure of 1.11 atm and a temperature of 25 °C. What is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to 1850 mL and 325 K, respectively?
173.5 atm
4.25 atm
0.300 atm
0.235 atm
Answers
In typical conditions of 0°C - 1 atm 173.5 atm, a mole of just about any gas takes up 22.4 L.
What must proportion V of a helium-filled balloon weighing 5.0 kg be?The balloon's volume has to reach least 31 m3 en order to hoist the weight. Although this is the least volume needed, it should be noted that a higher volume would offer a bigger margin of organism .
Why does one mole of gas take up 22.4 litres?STP assumes a temperature of 273K and a pressure of 1atm. The volume of one mole of gas can be determined using the ideal gas equation. comprehensive step-by-step response One mole of typical particles at STP ($6.023 times 1023 dollars.
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Why does fragmented forest habitat increase the risk of predation on bird nests by cats, dogs, raccoons, and other animals? Responses Birds will prefer to make their nests at the edges of forest habitat. Birds are forced to build nests on the ground instead of in protected trees. Predators have an easier time spotting bird nests in fragmented habitat. Predators are more common at the edges of fragmented habitat.
Answers
The borders of fragmentation habitat are where predators are more prevalent.
What impact does deforestation have on bird breeding habits?Bird populations are directly impacted by deforestation, mostly due to the destruction of their habitat. A bird's environment serves as its home, and deforestation robs them of their habitat. Many birds are unable to procreate when they are removed from their native habitat, which ultimately causes a reduction in their number.
What impact does deforestation have on animals and birds?Due to the drastic changes it causes to vast areas of ecosystems and habitats, deforestation is one of the land uses that has the greatest impact on migrating birds. The effect of land usage on tropical forests may clearly be seen from above.
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20. Phylogenetic tree are used to help show which creatures are most closely related to each other. In the diagram below,
common ancestor. The line from the chicken and the line from the dinosaur connect, so they would have a common
the red dot shows the most common ancestor between a chimpanzee and a human. When two lines come together, there is a
ancestor. All the lines at the bottom connect, this would be the least common ancestor, but they are still related.
Chimpanzee
Human Chicken
Dinosaur
Most recent common
ancestor
Answers
Answer: a
Explanation: the explanation is
what is the two examples of metabolism?
Answers
Two examples of metabolism are catabolism and anabolism.
What is metabolism?
Metabolism refers to the chemical processes that occur within a living organism to maintain life. These processes involve the conversion of nutrients and other substances into energy and other molecules that are necessary for the growth, repair, and maintenance of cells and tissues.
It can be divided into two main categories:
Catabolism: It refers to the breakdown of complex molecules into simpler molecules, releasing energy in the process. For example, the breakdown of glucose to produce ATP (adenosine triphosphate) in cellular respiration is a catabolic reaction.Anabolism: It refers to the synthesis of complex molecules from simpler molecules, consuming energy in the process. For example, the synthesis of proteins from amino acids in the body is an anabolic reaction.Metabolism is essential for life as it provides the necessary energy and molecules for cellular functions such as growth, repair, and reproduction. The rate of metabolism can be influenced by various factors such as age, sex, diet, exercise, and genetics.
Therefore, two examples of metabolism are catabolism and anabolism.
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Complete question is: Two examples of metabolism are catabolism and anabolism.