Which of the following is NOT a source of genetic variation in a population ?

A. Recombination

B. Gene Flow

C. Extinction

D. Mutaion​

Answers

Answer 1
the answer for this question is C i hope that helps you out
Answer 2
Extinction is the answer

Related Questions

help?ill mark brainlist

Answers

Answer:

b seems r8 answer.........

your answer is B!!!!

PLEASE HELP ME WITH THIS REPORT!! Due Friday night (4/2/21)
Project: Solar Cooker
Instructions
Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.
(from edge physical science 2021)

Answers

Answer:

Hope You Get An A+

Explanation:

The cholesterol associated with membranes

- helps stabilize the membrane at body temperature
- is attached to proteins and extends into the environment surrounding the cell
- both a and c
- is an abnormality resulting from a diet high in cholesterol

Answers

Answer:

b) It interferes with the movements of the fatty acid tails of the phospholipids.

Explanation:

Cholesterol has many important functions, including its role in membrane permeability, especially the cell membrane, and its role in metabolism. Cholesterol reduces the permeability of lipid membranes. ... Cholesterol helps to restrict the passage of molecules by increasing the packing of phospholipids. Steroid molecule that makes membranes more fluid at low temps and more ordered at high temps.

- Flat, rigid, carbon rings interfere with the movement of phospholipids.

- Smaller and less amphipathic lipid that is only found in animals.

- Sandwiched between fatty acid tails of phospholipids.

What happens to oxygen that is produced during photosynthesis?
a. It is used by plants to carry out photosynthesis.
b. It is used by all organisms to carry out photosynthesis.
It is used by all organisms to carry out cellular respiration.
d. It is used only by plants to carry out cellular respiration.
C.

Answers

It would be C because oxygen isn’t used by plants and plants only So that would cross out there, B is wrong because humans can’t do photosynthesis. Plants are the only organism that can carry out Cellular respiration, so that takes out D so the only logical answer to say it is used by organisms to carry out cellular respiration
The answer is D because only plants use it all organisms don’t use photosynthesis and oxygen isn’t used in photosynthesis it is given off

AZT is a drug that is commonly used to fight HIV infection. The active component of AZT is a nitrogenous base that mimics thymine. Normal nucleotides CANNOT covalently bond to the thymine mimic. HIV's reverse transcriptase enzyme will use the thymine mimic instead of using thymine, whereas our DNA polymerase will not make this mistake. What is the most likely explanation for how AZT prevents HIV replication

Answers

Answer:

AZT works by selectively inhibiting HIV's reverse transcriptase, the enzyme that the virus uses to make a DNA copy of its RNA. Reverse transcription is necessary for production of HIV's double-stranded DNA, which would be subsequently integrated into the genetic material of the infected cell to produce its proteins. All reverse transcriptase inhibitors are analogues of the naturally occurring deoxynucleotides needed to synthesize the viral DNA and they compete with the natural deoxynucleotides for incorporation into the growing viral DNA chain.

The carbon cycle works in conjunction with which of the following?
Water cycle
Photosynthesis
all of biogeochemical cycles
nitrogen cycle

Answers

The answer is Nitrogen Cycle:)

what's a ripple effect

Answers

Answer:

You know when a droplet falls into the water and then the water removes that looks like its making O's around where the droplet has fallen? Thats what ripple is.

Explanation:

Now if youre talking about the ripple effect similar to mental health here what it is:

The ripple effect is often used colloquially to mean a multiplier in macroeconomics. For example, an individual's reduction in spending reduces the incomes of others and their ability to spend.

1. Which are the two important roles of the atmosphere?

Answers

The important role of the atmosphere is to supply oxygen, water, carbon dioxide and nutrients. It also protects all living things from extreme temperatures and radiation (protects us from harmful solar rays).

Which of these events would lead to an INCREASE in the size of a population of squirrels?
A. More squirrels are born that die
B. Some squirrels emigrate to a different ecosystem in search of food
C. New predators are added to the ecosystem
D. A large number of squirrels die because of a forest fire

Answers

A. More squirrels are born then die

Answer:

A

Explanation:

the answer cannot be D, since dying decreases the population. And it cannoy be c because if new predators are added, there might be others who will eat the squirrels. and b doesnt mean a decreasion or increason. so its neutral. therefor the answer is A

What does Darwin's theory of evolution suggest?

species change over time

different species can interbreed

extinct species are not related
to living species

animals that look alike are most closely related

Answers

Answer:

a.

Explanation:

What are the 3
environmental stresses?

Give examples for each of
the stressors

Answers

Stressors may be natural in origin, being associated with such environmental influences as:
competition, predation, disease, and other interactions among organisms
constraints related to climate or to inadequate or excessive nutrients, moisture, or space
disturbances such as wildfire and windstorms

how do Solids, liquids and gasses change states?

Answers

you melt a solid to turn into a liquid, then you boil the liquid to turn it into gas

Someone already answered but i’m going to provide more detail.
If you have an ice cube which is a solid and it melts, it turns into liquid water instead of frozen. Now, if you put that same water in a pot on top of a stovetop, once it reaches boiling point (212°F) then it will turn into a gas and start to bubble. I hope this helps! :]

Detrimen WHY the following statement can occur in DNA ?


a. the sequence -A-C-C-T-C-G- may be present in the DNA molecule

c. the ratio A: T and C: G is the same in the DNA molecule

e. the sequence -C-G-U-A-A-G-may be present in the mRNA molecule

f. the sequence -T-G-C-A-C-U- can not occur in the RNA molecule


How can I answer this question ?
Thanks allllllot​

Answers

Answer:

c

Explanation:

I don't know about other but adenine is with tyamine and guanine with cyanine

How does pregnancy begin?
A. A placenta forms in the uterus.
B. Contractions begin in the uterine wall.
C. A sperm reaches an egg in the fallopian tube.
D. The blastocyst differentiates into two cell types.

Answers

the answer is c a sperm reaches an egg in the Fallopian tube

Pregnancy begins with reaching of sperm to an egg in the fallopian tube. The correct option is C.

What is fertilization?

Fertilization is outlined as the merger of two haploid gametes, the spermatozoa and the oocyte.

It happens for the establishment a zygote and initiate a sequence of mitotic divisions that consequences in cell differentiation and embryo progression.

Fertilization is the starting point of pregnancy.

Thus, the correct option is C.

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For more than a decade, Greenland has been losing about 600 trillion pounds of ice per year. The change in the distribution of weight on Earth changes how Earth wobbles on its axis. How can a change in Earth's wobble affect Earth's climate ?
A. Wobbling away from the sun can cool down regions.
B. Wobbling in the direction of the sun can cause large ice sheets to form
C. Wobbling away from the sun can cause polar ice caps to melt.
D. Wobbling in the direction of the sun can cool down regions .​

Answers


A is the corect answer ! I hope this helped !

What might happen to the cell if it were suddenly unable to use lipids?
A. It would not be able to make proteins or transfer substances to other cells

B. would not be able to transfer genetic information to other cells

C. It would not be able to store energy or communicate with other cells

D. It would not be able to store water or protect itself from viruses

Answers

What might happen to the cell if it were suddenly unable to use lipids?

(A) It would not be able to make proteins or transfer substances to other cells

(B) Would not be able to transfer genetic information to other cells

(C) It would not be able to store energy or communicate with other cells

(D) It would not be able to store water or protect itself from viruses

Explanation:

Water moves in and out of a cell in conformity with the concentration gradient formed between the membrane of the cell and the extracellular solution. The process whereby the water moves from a region of low solute concentration to a high solute concentration via a semi-permeable membrane is called OSMOSIS.

In this case, the solute concentration of the blood cannot be regulated, hence, it rises. This causes the solute concentration of the blood to be high or is said to be hypertonic than the cell's. This creates an osmotic gradient causing water to flow out of the hypotonic (low solute concentration) cell into the hypertonic extracellular environment (blood). Once water flows out of the cell as a result of osmosis, the cell shrinks or shrivels i.e. reduce in size.

. The number and type of prey items found in the owl pellet can be the result of the following factors: availability and abundance of prey, the ease or difficulty of catching the prey, and the taste preference of the owl. Create an experimental design that would describe the diets of barn owls while accounting for these factors.

Answers

Answer:Check for availability of prey in same habitat as the Barn owlDetermine the type of  prey available in the habitat because Owls feed mostly on small rodents like mice, vole e.t.cIf there is an abundance of prey, Check for the most common and easy to catch prey for an owl . considering the taste of the Barn owls while carrying out this experiment . The Barn Owls feed mostly on Field voles to other kinds of rodents. therefore the availability and ease of catching a Field vole should be prioritized if they are readily available in the same habitat with the Barn Owls. if Field voles are not available the Barn owls can also feed on other rodents and smaller birds available .Conclude your experiment

Explanation:

Experimental design based on the factors mentioned

Check for availability of prey in same habitat as the Barn owl

Determine the type of  prey available in the habitat because Owls feed mostly on small rodents like mice, vole e.t.c

If there is an abundance of prey, Check for the most common and easy to catch prey for an owl . considering the taste of the Barn owls while carrying out this experiment .

The Barn Owls feed mostly on Field voles to other kinds of rodents. therefore the availability and ease of catching a Field vole should be prioritized if they are readily available in the same habitat with the Barn Owls. if Field voles are not available the Barn owls can also feed on other rodents and smaller birds available .

Conclude your experiment

The diets of barn owls depend on the availability and abundance of prey, the energy requires to catch the specific prey, and taste preference based on its behavior.

What do you mean by Prey?

Prey may be defined as an animal or any other organism that is hunted or killed by another animal for the purpose of food.

Barn owl decides its food on the basis of availability and abundance of prey because in order to survive barn owl checks the presence of a particular prey that are easily available and found in high number. Mostly barn owl prefers small species of rodents like mice, young one of rabbit, and sometimes birds.

Other than this it also depends on how much energy is required to catch the particular prey because if the energy is greater than that of benefit, barn owls eliminate this behavior.

And last barn owls choose those prey that is palatable in nature and have good taste. Bad taste or toxic taste is eliminated in nature.

Therefore, the diets of barn owls depend on the availability and abundance of prey, the energy requires to catch the specific prey, and taste preference based on its behavior.

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Helppppopoo plssssssssssss!!!!!:(

Answers

Answer:

Probably D

Explanation:

All the other ones are false except D.

answer:D all the other ones are probably fake

Which are examples of pathogens? (Choose all that apply)
Parasite
Virus
Plants
Water
Fungi
Bacteria
Poop

Answers

Answer:

virus

bacteria

fungi

poop

Explanation:

What is the significance of pepsin in this experiment? (Why is it included?)

Question 2 options:

Pepsin is an enzyme, it breaks the bonds within proteins.


Pepsin is an acid, it will dissolve anything.


Pepsin is a basic substance, it will dissolve anything.


Pepsin is the protein we are studying.

Answers

al 1

Explanation:

esuna  ustancia rompe los enlacs

. ​Describe it in your own words

Answers

Answer:

the cycle of the re-growth and how nitrogen affects the elements around us  

Explanation: I really just wanted to know if this would help you. hope it did.

г
Question 7 of 10
Which molecule is a product of photosynthesis?
O A. Sugar
B. Nitrogen
O C. Carbon dioxide
D. Water

Answers

The answer is sugar
a) sugar/ photosynthesis is The process in which light energy is converted to chemical energy in forms of sugars

The chart below shows the inferred evolution of some dinosaurs during three time periods in Earth’s history.
Which dinosaur most likely evolved from Coelophysis?Immersive Reader
(5 Points)


Camptosaurus

Triceratops

Theodont

Tyrannosaurus

Answers

Answer:

camptosaurus

Explanation:

I think it's correct

The Dinosaur that most likely evolved from Coelophysis is known as Camptosaurus. Thus, the correct option for this question is A.

What is Evolution?

Evolution may be characterized as the complete methodology of gradual change that takes place over many generations, during which species of animals, plants, or insects slowly change some of their physical characteristics.

Coelophysis lived during the late Triassic period some 216.5 to 203.6 million years ago. Researchers believe that this small theropod lived on river floodplains where it walked alongside crocodilian-like Camptosaurus. They were small theropod dinosaurs that lived in what is now North America and Southern Africa during the late Triassic.

Therefore, the Dinosaur that most likely evolved from Coelophysis is known as Camptosaurus. Thus, the correct option for this question is A.

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Comprehension Questions: Answer all the following questions in complete sentences!
Population Density
1. A population of 140 earthworms live in an area of 4
m2, what is the population density?
D=???
D= ???
I
I
D= ???

Answers

Answer:

density =population size/area of habitat

Explanation:

density =140 earthworms/4m²

=35 earthworms/m²

A_____slide has an indentation in the center to hold the specimen , which is advantageous for larger specimen.
A. Coversilp.
B. Depressio.
C. Wet mount​

Answers

Answer:

B

Explanation:

Answer:

B depressio

Explanation:

What is true about the evolutionary relationships between groups of animals on a phylogenetic tree?

a. The closer animals are located on a tree, the more characteristics they share.

b. Animals on a tree are related only if they are on the same branch of the tree.

c. Only the animals close to the bottom of the tree share a common ancestor.

d. The further apart animals are on a tree, the more closely they are related.

Answers

Answer:

The closer animals are located on a tree, the more characteristics they share.

Explanation:

The pattern of branching in a phylogenetic tree reflects how species or other groups evolved from a series of common ancestors. In trees, two species are more related if they have a more recent common ancestor and less related if they have a less recent common ancestor.

A DNA molecule carries information that specifies some traits of an organism. This information is found in the-
ОООО
shape of the molecule that is known as a double helix
order of nitrogenous bases in a single strand of nucleotides
number of different kinds of nucleotides in the molecule
kinds of nitrogenous bases that form complementary nucleotide pairs

Answers

Answer: The fourth answer

Explanation: The alternating sequence of complementary bases is what determines traits found in organisms

In DNA molecule, the information is found in kinds of nitrogenous bases that form complementary nucleotide pairs.

What are the functions of DNA?

Deoxyribonucleic acid (DNA) is an organic chemical that contains genetic information and instructions for protein synthesis. It is found in most cells of every organism.

DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins.

DNA is made of nucleotides. A nucleotide has two components: a backbone, made from the sugar deoxyribose and phosphate groups, and nitrogenous bases, known as cytosine, thymine, adenine, and guanine.

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Which characteristic do jawless fish and cartilaginous fish have in common?

jaws
scales
skeleton of cartilage
tube-shaped body

Answers

Answer:

C. skeleton of cartilage

Explanation:

i got it right on edge

Why is cigaratte smoking injurious to health ?
Name the enzyme which is present in infants but may be absent in adults.​

Answers

Explanation:

cigaratte smoking is injurious to health because it affects our lungs,heart and different internal organs of our body which is cause of cancer and other non curable diseases.

Answer:

During smoking the cigarettes fumes make the walls alveoli very thin which causes rupturing of alveoli. This reduces the surface area for gaseous exchange in lungs .

To make up for the reduces gaseous exchange the heart has to pump more blood.

!.A cladogram is...


A. A two-word scientific name consisting of the organism's genus and species names.


B. An ordered system to classify organisms


C. A branching diagram that shows patterns of shared characteristics within organisms


D. The evolutionary development of a species



please help


I will give brainliest and five stars ane 19 points for the best answer

Answers

Answer:

hi

Explanation:

A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms. ... These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it.

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