Which one of the following conditions would allow gene frequencies to change by chance? (A) large population (B) small populations (C) mutation (D) gene flow
Answers
The correct option is (B) Small populations
Small populations would allow gene frequencies to change by chance.
How gene frequencies can change by chance?In small, reproductively isolated populations, specific circumstances can quickly alter gene frequencies, fully independent of mutation and natural selection. These changes can only be the result of random events. The population is more susceptible to these arbitrary changes as it gets smaller. The term for this phenomenon is genetic drift. Since genetic drift is only statistically effective in small populations, it must have played a significant role in the early stages of human evolution when our populations were small.Learn more about the Genetic drift with the help of the given link:
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Related Questions
describe the trends for world population and water use
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The exact number of people living on Earth in the coming decades is uncertain, but we do know that the population will continue growing, and this will impact water availability. Investing in efforts that slow the rates of population growth through increasing access to voluntary family planning services can help ensure that ample water is available for global food production, ecosystem health, and political and social stability.
Links between Population and Water
Population growth is a major contributor to water scarcity. Growth in populations means mounting demand and competition for water for domestic, industrial, and municipal uses. Water
is also needed for agriculture and industrial use, and for the evacuation of waste materials. The most water scarce or stressed areas are typically those with few water resources,
high population densities, and high population growth rates.3 Population growth limits the amount of water available per person, drives people into marginal regions—which are already water stressed—and also
into cities. For instance, most of the countries in the Middle East and North Africa (MENA) region cannot meet their current water demand. Seven of the world’s 10 water scarce countries are in the MENA region 4. With per capita water availability projected to fall by half by 2050,
the situation is likely to be dire in the coming years.5 Projections show that by 2035, 3.6 billion people will be living in areas with water stress or scarcity, as population growth causes more countries and regions to become water scarce6. The path of future population growth will impact water stress and scarcity .This path will largely depend on the choices that men and women make today about the size of their families, and the family planning services that are available to them as they make these choices.
Agriculture accounts for approximately 70 percent of global water use, and for as much as 95 percent of water use in predominantly agriculture-based countries. Agriculture not only requires a large amount of water, but it is also one of the most inefficient uses of water.8 A growing population requires more food. More water is needed
to produce that food. Agricultural productivity is a crucial component of global food security and, therefore, water scarcity and hunger are closely interrelated. Population growth,
along with development, will double global food demand by 2050. This will require increased agricultural production and put increased pressure on water resources.9
At which of the following time periods of life is one likely to see a peak in grip strength, cardiac output, maximum oxygen uptake, and bone density
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One is likely to see a peak in grip strength, cardiac output, maximum oxygen uptake, and bone density during early adulthood, typically between the ages of 20 and 30.
During this period, individuals are generally in their physical prime and experience the highest levels of physical performance and fitness. After this period, these physiological attributes gradually decline with age. It's important to note that individual variations, lifestyle factors, and overall health can influence the exact timing and magnitude of these peaks.
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yall please help me!!!
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A population of water beetle lives in a small pond on a cattle range. During a severe drought, a herd of cattle accidentally drink up many water beetles from a water source, preventing the beetle's genes from being passed to future generations. Which of the following evolutionary mechanisms is represented by this scenario?
A.Gene Flow
B.Genetic Drift
C.Independent Assortment
D.Mutation
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If the producer trophic level started with 1000 units of energy, what
amount of energy will the primary consumer trophic level have?
A. 1 unit
B. 10 units
C. 100 units
D. 1000 units
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Answer:
I believe that it would be C because of the 10% rule
Explanation:
a scientist came across two populations of beetle specieis, each puring breeding one population was all red in color, the other was all black the scienist mated one red beetle with one black beetle, and the offspring were all black. what is the dominance relationshp between the two alleles
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Based on the information provided, we can conclude that the allele for black color is dominant over the allele for red color.
The fact that all the offspring are black suggests that they all inherited the dominant black allele from one of their parents (the black beetle), and the recessive red allele from the other parent (the red beetle). However, since the black allele is dominant, it masks the expression of the red allele, resulting in the offspring all having black color.
This is an example of Mendelian inheritance, where the dominant allele determines the phenotype, while the recessive allele is only expressed in the homozygous state (i.e., when an individual inherits two copies of the recessive allele).
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PLEASE HELP i need this fast i will give BRAINLIEST
Answers
Answer:
1 is
Explanation:
no. 1 is water cycle
no.2 is food chain
no.3 is carbon-oxygen cycle
no.4 is mineral cycle
help pls. put answer for 15 points and breinlist
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Answer:
Answers A and B are both correct
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Answers
Answer:
neutrons
Explanation:
Answer:
neutrons
Explanation:
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the hunter aimed at the monkey with his blowgun and fired at the same instant as the monkey released its grip on the branch. the hunter will hit the monkey multiple choice question. only if the monkey was light. only if the monkey was heavy. regardless of whether the monkey was light or heavy.
Answers
The hunter will hit the monkey regardless of whether the monkey was light or heavy.
The outcome of the hunter hitting the monkey does not depend on the weight of the monkey. The key factor in this scenario is the timing of the hunter's shot in relation to the monkey releasing its grip on the branch.
If the hunter accurately aimed and fired at the same instant as the monkey let go, the projectile from the blowgun has a high chance of hitting the monkey, irrespective of its weight. The weight of the monkey does not affect the trajectory or speed of the projectile once it is released from the blowgun.
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The size P of a certain insect population at time t (in days) obeys the function P(t) = 500 e 0.04t (a) Determine the number of insects at t=0 days. (b) What is the growth rate of the insect populatio
Answers
Answer:
(a) When t=0, we have p(0) = 500 e^(0.04*0) = 500 e^0 = 500(1) = 500. Therefore, there are 500 insects at t=0 days.
(b) The growth rate of the insect population is given by the derivative of the function p(t): p'(t) = 500(0.04)e^(0.04t) = 20e^(0.04t). This means that the growth rate is not constant, but rather it increases as time t increases. For example, at t=1 day, the growth rate is p'(1) = 20e^(0.04*1) = 20e^0.04 ≈ 21.64. This means that the insect population is growing at a rate of approximately 21.64 insects per day at t=1 day.
what type of energy is represented by part number 1
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The type of energy that is represented by part number 1 is sunlight or solar energy.
What is solar energy?The sun is one of the most significant energy sources. Most of the energy on earth comes from the sun, which is where it all began.
The sun's energy warms the planet, generates wind and weather, and keeps plant and animal life alive. There are waves of various frequencies and wavelengths throughout the electromagnetic spectrum. On the surface of the Earth, the Sun serves as the primary energy source.
It functions like a powerhouse, producing and releasing energy in the form of heat and light. Solar energy is the name for this energy that the sun continuously emits.
Therefore, Sunlight or solar energy is the sort of energy that component number 1 stands for.
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Now explain your diagnosis. Start your argument by writing something like this:
“My group believes that Elisa has/does not have ___. I think that she does/does not have the ___ condition because . . .”
(Then, explain how molecules move through the body when someone has the condition you investigated, and compare that to Elisa’s test results.)
Answers
Answer:
you can use this syntax to answer your q
Explanation:
"My group is convinced that Elisa has a particular illness. Based on her symptoms and test findings, I believe she has the illness because the molecules of the particular drug we have been looking into are not flowing through her body as they should. Elevated quantities of this drug were found in her test results, which is a certain sign of this illness. Additionally, she exhibits symptoms that are characteristic of patients who have this illness."
why are there 2 hydrogen atoms and only one oxygen
Answers
Answer:
Oxygen is an electronegative
Explanation:
Not only is it because in the chemical equation for water there is 2 hydrogen atoms and 1 oxygen atom, but they also share their electrons to fill their outermost levels and that are attracted together.
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the system that maintains the human species from generation to generation is the
Answers
The system that maintains the human species from generation to generation is the REPRODUCTIVE system. This system is responsible for producing male and female gametes.
The reproductive system is an organ system by which humans produce male (sperm) and female (ovule) gametic cells.
Male and female gametes fuse during fertilization to produce a diploid zygote that develops into an adult individual.
In women, the reproductive system is composed of the ovaries, uterus, fallopian tubes, cervix, and vagina.
In men, the reproductive system includes the testes, prostate, and penis.
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Hellllpplpppppppppppp
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Answer: limited resources
Explanation: the more animals, the more resources you need.
Select all that apply.
Animals need plants for:
-oxygen
-carbon dioxide
-food
-chlorophyll
-energy
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Answer:
animal need plant for food and oxygen
what is the connection between inhumane farming methods and ill-health? Explain.
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Answer:
Various inhumane farming practices are found to be taking place that affects the health of animals, make them weak and are often left to die in the diseased condition. This promotes production but at the same time also makes them sick and unhealthy.
Explanation:
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Answers
Answer:
C
Explanation:
the amount of amini acids don’t matter. What matters is the sequence of the amino acid which determines the function of a protein.
how do organisms in an ecosystem depend on detritivores
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Answer:
A detritivore is a heterotrophic organism, which obtains its nutrition by feeding on detritus. Detritus is the organic matter made up of dead plant and animal material. Detritivores may also obtain nutrition by coprophagy, which is a feeding strategy involving the consumption of feces.
In a certain species of insect, some individuals have flattened white disks on their bodies that protrude and interlock, resembling an orchid flower. This adaptation provides the insect with a better opportunity to capture its prey. If environmental conditions remain unchanged, it is most likely that, in future generations, the proportion of the population with this adaptation will
Answers
Answer:
A) increase only
Explanation:
this adaptation will benefit these species, therefore, increasing the population
Which of the following cell structures is specialized for transport of materials into and out of the cell?
Periplasmic space
Cell membrane
Endoplasmic reticulum
Cell wall
Answers
Cell membrane is specialized for transport of materials into and out of the cell.
In what way is the cell membrane specialized for material transport?The cell membrane, also known as the plasma membrane, is a vital structure in cells that serves as a selective barrier, controlling the movement of substances into and out of the cell.
It is specialized for transport through the presence of various proteins and lipid components that facilitate the passage of specific molecules.
The cell membrane consists of a phospholipid bilayer with embedded proteins. These proteins, such as channels, carriers, and pumps, play essential roles in transporting ions, nutrients, and other molecules across the membrane.
Channels provide a passageway for specific substances to move freely, while carriers facilitate the transport of molecules by binding to them and undergoing conformational changes. Pumps actively transport molecules against their concentration gradient, requiring energy in the form of ATP.
The cell membrane also contains receptor proteins that allow the cell to communicate with its environment by binding to specific molecules, triggering cellular responses. This communication enables the cell to detect and respond to signals and regulate the transport of substances accordingly.
In summary, the cell membrane is specialized for material transport through its composition of phospholipids and proteins.
These components work together to selectively allow the passage of certain substances into and out of the cell, ensuring proper functioning and maintaining homeostasis.
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Here is a food web:
Which of these correctly describes what the arrow stands for?
a. Eats
b. Gets energy from
c. Provides energy to
d. Depends on
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Answer:
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C. Provides energy to
true/false. eutrophication is the process by which lakes and rivers receive a lot of nitrogen and phosphorous, causing excessive algal growth.
Answers
Eutrophication is the process by which lakes and rivers receive a lot of nitrogen and phosphorous, causing excessive algae growth.
The given statement is True.
The process by which a body of water, or certain areas within it, gradually become richer with minerals and nutrients, especially nitrogen and phosphorus, is known as eutrophication. It is also known as "nutrient-induced increase in phytoplankton productivity".
Nutrient buildup in lakes and other bodies of water causes a natural process called eutrophication. Algae that feed on nutrients grow on the water surface, decreasing recreational value and clogging water-intake pipes.
Natural sources of nitrogen and phosphorous include the decomposition of organic matter within the water as well as the movement of these elements from the land to the sea via streams, rivers, and runoff from rainfall.
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Vernon is studying the population of deer in a tract of forest. He gathers the following data.
Birth rate:~50 deer/year
Death rate:~70 deer/year
Which additional observation would support the conclusion that the deer population is NOT changing size from year to year, meaning that the net population change is 0?
A. About 20 deer per year immigrate to the tract of forest.
B. About 20 deer per year emigrate from the tract of forest.
C. The average life span of a member of the deer population is 20 years.
D. If a deer survives its first year of life, its average life span is 20 years.
Answers
Answer: A.About 20 deer per year immigrate to the tract of forest.
Explanation:if 50 deers are born every year and 70 deers die every year but the population doesn't change it means deers immigrate to the tract of forest.
Sound science is based on one time ocurrences. True or false
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what part of the universe do we live in??
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the purpose of including glucose as a significant chemical parameter by a laboratory that performs macroscopic screening is to check for the presence of:
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The purpose of including glucose as a significant chemical parameter in macroscopic screening is to check for the presence of abnormal blood sugar levels.
How does including glucose as a chemical parameter help detect abnormal blood sugar levels in macroscopic screening?When a laboratory includes glucose as a significant chemical parameter in macroscopic screening, it serves the purpose of checking for the presence of abnormal blood sugar levels. Glucose is a crucial indicator of the body's carbohydrate metabolism and can provide valuable information about the functioning of various organ systems, particularly the pancreas and liver, which play a role in blood sugar regulation.
By measuring glucose levels in the blood or other bodily fluids, macroscopic screening can identify potential abnormalities such as hyperglycemia (high blood sugar) or hypoglycemia (low blood sugar). These conditions can be indicative of underlying health conditions like diabetes mellitus, metabolic disorders, hormonal imbalances, or organ dysfunction.
Including glucose as a significant chemical parameter allows the laboratory to flag potential issues with blood sugar regulation, prompting further investigation or appropriate medical interventions. It helps healthcare providers assess a person's glycemic control, monitor diabetes management, and evaluate overall metabolic health.
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a
The flu occurs when someone is infected with a specific virus. You may know you're sick when you have a fever, a
body temperature above 98.6° F. Based on your understanding of the reading passage, how do you think a fever
would affect enzymes and chemical reactions in your body? Would it decrease, increase, or have no effect on
them? Explain your answer.
Include one paragraph in your answer.
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What is a cactus' environmental pressures?
Answers
Explanation:
high temperature and low rainfall this leads to the need for adaptation to conserve water and tolerate extreme heat one of the main environmental pressures for cacti is water