What type of variation is necessary for natural selection to occur? (3 points)

Group of answer choices

Artificial variation

Environmental variation

Genetic variation

Neutral variation

Answers

Answer 1

Answer:

Genetic

Explanation:


Related Questions

A patient named Roberto is grieving because he noticed that the money he has saved all his life is not going to his family but is instead going to his medical bills. He is also worried that he will eventually become a burden on his family. His nursing assistant called a social worker to help him cope with the emotional strain of his situation. Which need did the nursing assistant help with?

physical comforts

spiritual comforts

social needs

financial needs

Answers

Answer:

physical and social

Explanation:

physical because the social worker will help with talking to him and making him feel better

social because he might get money help


Studying____
we infer how Pangea split into continents

Answers

Answer:

Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle.

Explanation:

Answer: Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle.

Explanation: Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland.

In which direction is the wind likely to blow in the picture?
WATER
LAND
A. From the ocean to the land
B. From the sun to the land
O O O O
C. From the land to the ocean
D. From the land to the sun

Answers

Answer:

From the ocean to the land. just took the quiz.

Explanation: a p e x

During the day, the air above land in coastal regions warms up more quickly and starts to rise, hence option A is correct.

What is the direction of the wind?

As the warm air rises, a low-pressure region develops on the surface, enabling air from the sea to enter. As a result, the wind blows from the sea to the land during the day.

Predominant winds often blow east-west rather than north-south, especially in the afternoon when the land is being heated by the sun to its maximum.

the Coriolis effect causes wind systems to twist counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere most frequently in the spring and summer.

Therefore, because of the greater temperature differences between the ocean and nearby land, hence option A is correct.

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Select the correct answer. What falls in the gray area between living and nonliving things? A bacteria B. mold C. virus D. yeast Reset​

Answers

Answer: C Virus

Explanation:

Why is it virus?, you may ask. Well... virus falls on the grey area between non living and living things

The cohesion-tension theory proposes that the physical properties of water allow the rise of water through a plant. Sketch and describe cohesion and adhesion of water molecules. Don't do the sketch part only do just the description part.

Answers

Answer:

Cohesion: the attraction force between the same type of molecules.

Adhesion: the attraction force between different types of molecules.

Plz help!!!!
Kinda in a hurry to catch up on biology rn anything can help!!!

Answers

Answer:

16. Control group: Subject A

17. Independent (manipulated) variable: Type of powder

18. Dependent variable: Itching time

19. Explain whether the data supports the advertisement´s claims about its product. Yes, it does.

Explanation:

Control group: The control group is used to identify if there are any other factors influencing the results obtained by the treatment in the study (in this case, the new product), from the results that might be a consequence of other factors. The control group must be selected from the same population as the treatment group. Data from an experimental group are compared with the data from a control group. These two groups are identical in all aspects except for the independent variable that the researcher changes in the experimental group to observe how they affect the individuals.  

The experimental group is the one that receives the experimental procedure, with changes in the independent variable.  There can be several experimental groups. In this case, the experimental group is subject B.

Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the type of powder is the independent variable.  Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. In the exposed example, inching time is the dependent variable, that depends on the type of powder used. The data does support the advertisement´s claims about its product. The effect of the new product lasts 50% more than the original product. The old powder produced itching for 30 minutes, while the new product produced itching for 45min (15 more minutes, 50% more).

which of these provided information about animal adaptations to climate change?
a. fossils
b. ice cores
c. tree rings
d. sea-floor sediment

Answers

Answer: floor

Explanation:

Fossils are structures which provided information about animal adaptations

to climate change.

Fossils refers to remains of living organisms which have been replaced in the form of rock particles due to its presence in the soil for a long period of time.

The fossils contain an understanding of the structures and characteristics

the animals had which is then compared to its present structures. This helps

to explain how the animals adapted to climate change through changes in

the structure, shape of parts of the body.

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Which row shows the chambers of the heart, from those with the thickest walls to those with the
thinnest walls?
from top to bottom it goes from the thickest to thinnest
A.
atria
left ventricle
right ventricle
B
atria
right ventricle
left ventricle
с
left ventricle
right ventricle
atria
D
right ventricle
left ventricle
atria

Answers

The answer is: B Atria, Right Ventricle, Left Ventricle
The right and left atria because they are low-pressure chambers that serve as storage units and conduits for blood so they would be the thinnest


What did Robert Virchow observe when he witnessed a cell dividing in half?

Answers

Answer:

The correct answer is - all cells arise from pre-existing cells.

Explanation:

Robert Virchow observed during the cell division in half that a single cell divide into two new cells therefore he suggested that, a famous aphorism Omnis cellula e cellula which means all cells arise from pre-existing cells. His observation is one of the major points of the cell theory.

This observation made by Robert Virchow becomes the fundamental basis of the cell theory which describes that cell divides to produce new cells. The other greatest observation made by him was that all cells not get sick or affected but a group of cells only.

James examines a cell from an aloe plant and a cell from an owl feather. Which structure is found only in the cell from the aloe plant?
O A. chloroplast
OB. membrane
O C. mitochondrion
O D. nucleus

Answers

I’m thinking it’s A. Chloroplast

The chloroplast will only be found inside the Aloy plant while other structures will be shared by both cells. Option A is correct.

Difference between Plant and animal cells:Both plant cell animal cells are eukaryotic cells, but both have some unique structures.Plants have a cell wall but animals just have a cell membrane.A plant cell has a chloroplast for photosynthesis while an animal cell does not have a chloroplast.

Since owl is an animal and Aloy is a plant

Therefore, the chloroplast will only be found inside the Aloy plant while other structures will be shared by both cells.

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What is the role of oxygen in photosynthesis

Answers

Photosynthesis is the process in which light energy of the sun is converted to chemical energy. ... The oxygen so released is used in the respiration process to break down complex molecules (generated in photosynthesis) and releases energy in the form of ATP (adenosine triphosphate) molecules.

Answer:

as fare as I can remember oxygen is actually a waste product that is produced at the end of a plant's photosynthesis cycle

Explanation:

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10. What was the result when Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly?

Only male offspring had red eyes

Half the offspring had white eyes.

All the offspring had red eyes.

All the offspring had white eyes,

Answers

Answer:

When Thomas Hunt Morgan mated a white-eyed male fly with a red-eyed female, he came to the startling conclusion that the trait for eye color was located on the chromosome that determines sex. ... F2 generation: The offspring showed a ratio of three red-eyed flies to one white- eyed fly.

Explanation:

Answer:

all the offspring had red eyes.

Explanation:

gradpoint

what’s the chemical reaction for the digestion of fats.

Answers

Answer: The chemical reaction for the digestion of fats is when A triester is produced through the chemical reaction of three fatty acid molecules with glycerol, a molecule that contains three hydroxyl groups. When fats are broken down these fatty acid chains and glycerol are free for the body to use.

Explanation:

Lipids (fats and oils)

Lipase enzymes break down fat into fatty acids and glycerol. Digestion of fat in the small intestine is helped by bile, made in the liver. Bile breaks the fat into small droplets that are easier for the lipase enzymes to work on. Bile is not an enzyme.

Please help!!

When purchasing an electrical device, what are the two financial costs you need to consider? Are there any environmental considerations you would make? Explain your reasoning.

Answers

Answer:

Initial price and operating cost

Name 2 ways that the Theory of evolution is currently being used to improve the quality of human life

Answers

Answer:

The answer to the question: Name two ways that the Theory of Evolution is currently being used to improve the quality of human life, would be: Through the development of evolutionary biology, and 2. Through the comprehension of how the systems of disease, and health, work.

Answer:

Through the development of evolutionary biology.And Through the comprehension of how the systems of disease, and health, work.

Identify the statement below that is NOT a principle of evolution. O Populations evolve, individuals do not O Negative adaptations will become more common in a population O Variations occur naturally within a population Adaptations help individuals compete successfully for survival

Answers

Answer:

Negative adaptations will become more common in a population

Explanation:

that's the one that is NOT a principle

Negative adaptations will become more common in a population is NOT a principle of evolution.

what is population ?

A discrete accumulation  identifiable characteristics such as people, animals with the objective of analysis and data collection is called a population.

A population consists of a same group of species who reside in a particular geographical place with their reproductive capacity to interbreed.

In a population Not all individuals are able to survive and reproduce due to genetic variations in them, a local population is  restricted to a smaller area or can occupy a larger area, making up for the entire species.

when individuals in local populations spread between other local populations called as metapopulation.

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Give an example of exaptation in humans.

Answers

Answer:

As an example of an exaptation, Gould (1991) used the large size of the human brain and its function of enabling humans to produce speech. The large brain size, according to his argument, originally arose as an adaptation for some (unspecified) functions in humans' ancestral past ( Gould, 1991 ).

Explanation:

Answer:

As an example of an exaptation, Gould (1991) used the large size of the human brain and its function of enabling humans to produce speech. The large brain size, according to his argument, originally arose as an adaptation for some (unspecified) functions in humans' ancestral past ( Gould, 1991 ).

List down 5 evidence of exogenic processes and show how it affects or how it is affected by human activities.​

Answers

Answer:

Mass wasting has drastic effects on human and animals life in the form of landsliding , earthquakes . Deposition is the pres in which sediments , rocks and soil are added land mass . A positive effect of deposition is that it creates new land . And negative effect is it takes away new lands .

The five (5) evidence of exogenic processes on Earth's surface include the following:

1. Weathering.

2. Stripping.

3. Erosion.

4. Mass wasting.

5. Deposition.

Exogenic processes can be defined as the processes that occur at or near the surface of planet Earth due to the action (influence) of exogenic forces or geomorphic agents.

The five (5) evidence of exogenic processes on Earth's surface include the following:

1. Weathering: the removal of various minerals from rocks causes depletion in oil and gas reserves that may be available for human consumption.

2. Stripping: it involves the removal of essential chemical elements and  components from precious stones and landform such as a mountain.

3. Erosion: this causes flooding and washing away of various soil nutrients and as such affects agriculture.

4. Mass wasting: it moves rock debris, soil nutrients, and regolith downward, which are substances that are useful for certain human activities such as during mining.

5. Deposition: it is a consequence of erosion and it result in the laying down of sediment on a landform or landmass.

This sometimes make the foundation of buildings stronger to withstand stress.

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CAN SOMEONE HELP ME PLEASE ITS DUE RIGHT NOW !!! :(

Answers

G I help you get correct!

Which of the following is NOT part of the cell theory?

A : All life functions are carried on by cells

B: All cells come from cells that are already alive

C : All cells must breath air

D: All organisms are made up of cells

Answers

Answer:

C. Because that we had to go over that. That's so easy

During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material —

a increases the genetic variation

b reduces the diploid number to the haploid number

c increases the haploid number to the diploid number

d reduces the probability of mutations

Answers

Answer:

A

Explanation:

The primary source of energy in most ecosystems is/are

Answers

Answer:

The Sun.

Explanation:

Energy reaches the Earth in the form of electromagnetic radiation.

Terrestrial solar radiation means solar radiation that reaches the Earth after passing through the Earth's atmosphere. About 97% of solar radiation reaches the Earth in the range of wavelengths 0.29 - 2.5 μm, and about 3% with wavelengths greater than 2.5 μm.

 The tool that measures air pressure is called what?

Answers

Answer: A barometer !

Explanation:

Hoped this helped ! :)

Help As soon as possible !!!

Answers

answers= 1 and 4
adding more coils increases the strength between the poles


help me please its due in a hour

Answers

Answer:

The correct answer is - in the sickle-cell hemoglobin is the replacement of glutamic acid with valine in the β-globin amino acid chain.

Explanation:

Sickle cell anemia has a mutant gene in which that produces has valine amino acid instead of glutamate in the hemoglobin protein. In the given question the structure of the protein has only one difference that is the replacement of the glutamic acid in normal hemoglobin to valine in the β-globin amino acid chain in the mutant protein.

Valine 6 (beta chain) binds to a different hydrophobic patch (on the alpha chain and causes the disease in sickle cell anemia cases.

how to find the phenomenon of an essential question?

Answers

Answer: By reading and revising the literature based on phenomenon or by performing an experiment.

Explanation:

Essential questions are those key questions that can be asked from the students or the students can ask those questions after the lecture about a specific topic. The essential questions are asked by the teachers to determine the focus of the students on the lecture and how much information they have retained. This helps in improving the explanation ability of students. The essential questions are related to the phenomenon and it can be answered and find by recollecting what has been taught by the teacher, reading and revising the literature related to the phenomenon. These can also be answered by performing a scientific experiment.

Describe how an organism's genotypes codes for their phenotype. In your answer use the vocabulary terms: Phenotype, genotype, DNA, mRNA and protein. Please dont answer if you dont know it.

Answers

Answer:

The organism's genotype encodes their phenotype because the genotype corresponds to the characteristic that is determined by genes —formed by fragments of DNA— which are transcribed into mRNA to be translated into amino acid sequences in the synthesis of proteins, determining the morphological and functional characteristics of an organism, that is, its phenotype.

Explanation:

Genotype corresponds to the genetic information contained in the DNA, according to the sequence of nucleotides in its molecular structure. This genotype includes characteristics or polymorphisms that define the appearance and function of living beings.

Each DNA molecule constitutes a chromosome, formed by genes —DNA fragments— each of which determines specific characteristics.

When DNA is transcribed into mRNA, information is being sent that is necessary for the incorporation of amino acids into a protein that is being synthesized. The proteins, in turn, determine morphological and functional characteristics that constitute the phenotype of an individual.

Akshay decides one day to run a marathon without any training. After 10 minutes your lapsed and akashay, has run half a mile, he begins to get cramps in his thigh he's also breathing very rapidly what is causing the cramps on his legs?

Answers

Answer:

Lactic acid accumulation in the leg muscles

Explanation:

Muscle cramps are painful feelings caused by sudden contractions of the muscle. Cramps are caused by several reasons, however, based on the description of Akashay's activity, it is caused by ACCUMULATION OF LACTIC ACID in the leg muscles due to strenuous exercise.

According to this question, Akashay decided to run a marathon without any prior training. However, he started to get cramps on his thigh coupled with rapid breathing. There is a lack of oxygen in his cells, hence, anaerobic respiration was used leading to the formation of lactic acid. The buildup of lactic acid is what causes the painful sensation called CRAMP.

What is the role of the nucleus in plant and animal cells?
O
A. It stores the genetic information for the cell.
B. It serves as a boundary for the cell.
o
C. It produces energy for the cell.
O
D. It stores waste for the cell.

Answers

Answer:

Explanation:

It’s A I’m pretty sure

In the 1520s, the Spanish explorer Cortes and his armies carried the virus that causes smallpox to NorthAmerica and South America.
The graphs above illustrate the death rate among both Europeans and American Indians from smallpox at that time. Which of the following statements best explains the difference in death rates?

F. People in Europe were healthier than American Indians.

G. Antibiotics were available in Europe but not in North America.

H. American Indians had never been exposed to the smallpox virus, so resistant individuals had not yet become common.

J. American Indians were exposed to a virus that was different from the virus for smallpox in Europe.

Answers

Answer:

I can't see the graph but I believe that the answer is H

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