Which two processes are the primary sources of genetic variation?
mitosis and fertilization
synapsis and disjunction
mutation and recombination
overpopulation and reproduction

Answers

Answer 1

Answer:

mutation and recombination

Explanation:

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).


Related Questions

Classification systems are:
A) all the same
B) are all different
C) may vary with the taxonomist
D) none of these

Answers

Answer:

the answer is B, I believe

what causes the ripples to form?

Answers

Answer:

Ripples in water are more formally known as capillary waves, and are caused by the subtle interaction of wind and water, or the physical interaction of the water with another object.

A majority of the seed is made up of the...
a) seed coat
b) testa
c) endosperm
d) radicle

Answers

Answer:

Your answer is C) endosperm.

pls help!!!!! biology

Answers

Answer: I think it’s B

A peptide bond joins together two
acids.
A. Amino
B. Sulfuric
C. Fatty
D. Nucleic

Answers

The answer is A. Amino

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discuss the stages of the cell cycle mechanism that regulate it and how this cycle is related to the growth and maintenance of organisms

Answers

Answer:

The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions.

Cyclins regulate the cell cycle only when they are tightly bound to Cdks. To be fully active, the Cdk/cyclin complex must also be phosphorylated in specific locations. Like all kinases, Cdks are enzymes (kinases) that phosphorylate other proteins. Phosphorylation activates the protein by changing its shape.

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Which place is known as ‘Gateway of the Gods?

please donot spam,,,​

Answers

Answer:

Lake Titicaca

Explanation:

Which is located in peru.

in animals which organ is responsible for the force that moves blood through the body?

Answers

I belive it’s the heart

Which of the following statements is correct regarding the reactants and products for photosynthesis and cellular respiration?
Carbon dioxide and water are reactants in photosynthesis and products of cellular respiration.
Carbon dioxide and water are reactants in cellular respiration and products of photosynthesis.
Carbon dioxide is a reactant of cellular respiration, and water is a product of photosynthesis.
Carbon dioxide is a product of photosynthesis, and water is a reactant in cellular respiration.

Answers

Answer:

the answer is C

Explanation:

The type of the respiration that are taking place inside the cells are called as the cellular respiration in which carbon dioxide is the reactant and the water along with it is the bi product. The correct answer is option C.

What are the two products in the process of photosynthesis ?

The products of photosynthesis are oxygen that is released out with the glucose that is the sugar molecule which is the stored form of energy.

Photosynthesis converts  out carbon dioxide and the  water into the  oxygen and typically  glucose. Glucose is then  used as the  food by plant and the  oxygen that  is a by-product of the process. Cellular respiration  later just converts  out oxygen with the glucose into the  water and carbon dioxide.

Water and  the carbon dioxide are just the  by- products along with the ATP that  is the  energy which is just  transformed out  from process. In  the process of the cellular respiration where the  glucose and oxygen  together just reacts in order  to form  the ATP. Water and  the carbon dioxide are just  released as  the byproducts.

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1
Type the correct answer in the box.
In pea plants, yellow seed color (Y) is dominant and green seed color (y) is recessive. Based on the Punnett squares, what are the chances that
the offspring in the second generation will have green seeds?
First Generation
Y
Y
у
Yy
Yy
у
Yy

Second Generation
Y
у
Y
YY
Yy
у
Yy
yy
There is a
% chance that the offspring will have green seeds.
Reset
Next

Answers

In determining probabilities all you need to do is count and then divide by the number of results.

What is punnett square?

A Punnett Square is a useful tool for forecasting the changes and probabilities that can result from cross-breeding. This includes foreseeing the mating of different species, including humans and animals.

It is asking the chances of having green seeds and that's the recessive allele. For recessive traits to be expressed, there can't be a dominant trait next to it because the dominant trait will always be expressed. So the expected result should be yy (two lowercase) if you want the recessive trait to be expressed.

In the Punnett square of the second generation, there is 1 out of 4 yy genotype. So then divide 1 by 4 and multiply it by 100% to get the probability in percent.  So in short, the answer is 25%.

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What was the result of the Chernobyl disaster?
A.Wildlife sanctuaries were destroyed and animals moved out of the area
B. Decrease in the amount of cancers in Russian populations
C.Excess amount of cancers were detected as a result of radioactive contamination​

Answers

Answer:c

Explanation:

IS WORK DONE EVERY TIME A FORCE IS APPLIED TO AN OBJECT? EXPLAIN

Answers

Whenever a force is applied to an object, causing the object to move, work is done by the force. If you move the book at constant speed horizontally, you don't do any work on it, despite the fact that you have to exert an upward force to counter-act gravity.

The Global Conveyor Belt a deep ocean current is important because it___

Answers

Answer:

Global Conveyor Belt, a deep ocean current, is important because it ___. helps regulate global climate, it transports nutrients around the globe, and it transports warm water to colder regions

Explanation:

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The light energy has now been converted to chemical energy that is stored in _________ and _________
molecules. These molecules are used in the _________
to help make sugars.

Answers

Answer:

Sunlight is converted to chemical energy in the form of ATP (adenosine triphosphate), which is the main energy-storing molecule in living organisms. ATP is then transported throughout the chloroplast and used to provide the chemical energy necessary to power other metabolic reactions.

what is smooth er resonibale for?

Answers

The smooth endoplasmic reticulum functions in many metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids.

what kind of seismic wave does this slinky motion present?

Answers

Push and pull the slinky at the same time that you move it up and down your hand should move in a circle this circular motion wave models an earthquake wave called Rayleigh wave. Hope this helps

a) How many children does the couple have?

Answers

Answer:

Please show the whole question before putting it on the website

Explanation:

What happens if the water level in the blood drops too low?

Answers

Explanation:

If your blood sodium levels get too low, you might develop a condition called hyponatremia.

Because of the low sodium, the amount of water in your body rises ... usually appear when your level of sodium suddenly rises or drops.

A student looks through an eyepiece which magnifies by 10x and on objective lens 4x. What is the total magnification?

Answers


The same principle apply to stereo microscopes, a 10X eye piece combined with a 4X objective lens will produce 40X magnification.

15. Which of the following is a valid explanation for why people produce
synthetic materials?
A. Synthetic materials always biodegrade easily.
B. Synthetic materials do not require any natural resources to produce.
C. Synthetic materials are less artificial than natural resources.
D. Synthetic materials help meet societal demand for materials that are in
short supply in nature.

Answers

Im almost certain the answer is D but theres a chance I might be wrong

why does the number of yeast cells decrease during fermentation??​

Answers

Answer:Dough can still rise in cooler environments, but much more slowly. Amount of yeast; the more yeast the faster the fermentation. Too much can add an undesirable yeasty flavor.

What adaptations are common for animals in hot and cold climates? Name at least two for both hot and cold climates.

Answers

Answer:

Explanation:

1. hot- camels live in hot deserts where its extremely hot and sandy therefore they have long eyelashes to protect their eyes just in case of sand storms

2. cold- penguins live in very cold climates so they have both black and white fur white so they can disguise in the snow from predators and black so they can absorb heat from the sun when they get extremely cold

3. hot -thick fur on the top of the body for shade, and thin fur elsewhere to allow easy heat loss. a large surface area to volume ratio - to maximise heat loss. the ability to go for a long time without water - they lose very little water through urination and perspiration. the ability to tolerate body temperatures up to 42°C

The “Rule of 10” states that as little as ________ % of the energy at any trophic level is transferred to the next trophic level.

If I am a higher trophic level organism, this means that I need to eat MORE / LESS (circle one) food in order to fulfill my energy needs.

The majority of the energy is lost as ________________ through the completion of metabolic processes.

Answers

Answer:

1) "Rule of 10" states that as little as 10% of energy is transferred

2) Higher trophic level organisms need to eat MORE food, as energy is lost between trophic levels

3) The majority of the energy is lost as heat

Pls help fast I need to turn this in for Hw​

Answers

Answer:

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Explanation:

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True or False
If the statement is true, write "true." If it is false,
change the underlined word or words to make
the statement true.
Hi
1. Chromosomes are made up of nucleic
acids.
2. Vacuoles are the cell's powerhouses.
3. The endoplasmic reticulum is the “brain"
of the cell.
4. Yeasts perform a type of respiration
called fermentation.
5. Oxygen and ATP are the end products of
respiration.
6. In phase 3 of cell division (metaphase),
chromosomes attach to the spindle.
7. The movement of water through a cell
membrane is called diffusion.
8. Tissues make up the second level of
organization in living things.
98

Answers

Answer:

What are you kids doing these days

Explanation:

frfr

What will most likely happen in the absence of a nucleus? Genetic information will not be transmitted by the cell. Energy will not be released during cellular respiration. The cell will not store food, water, nutrients, and waste. The cell will lose its shape and structure.

Answers

Answer:

A-Genetic information will not be transmitted by the cell

Explanation:

Answer:

Genetic information will not be transmitted by the cell

Explanation:

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Describe how these three types of soil differ in terms of particle size, water-holding capacity, and
surface area for nutrient absorption by roots.

Answers

Answer:

Soils with smaller particles (silt and clay) have a larger surface area than those with larger sand particles, and a large surface area allows a soil to hold more water. In other words, a soil with a high percentage of silt and clay particles, which describes fine soil, has a higher water-holding capacity.

is bacteria prokaryotes

Answers

Answer:

Prokaryotes bacteria - Spirochaeta, Vibrio.

Explanation:

Only the single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes

Does it matter whether DNA sequence the mutation occurs

Answers

Yes, because if the sequence changes then it is not DNA anymore

Explain how endospores have allowed some bacteria, like tetanus, to be a successful species.

Answers

Answer:

Endospores allow Clostridium tetani (causative agent of tetanus) to survive harsh conditions in the environment.  Because tetanus is an obligate anaerobe, oxygen is a harmful environmental factor. Endospores also allow the bacteria to resist desiccation (drying) and high temperatures.  

The bacteria can be dormant as endospores until they are in favorable conditions.  At this point, they will germinate into vegetative cells where they will be able to reproduce until conditions become unfavorable and they form endospores again.

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Answer: spore open and bacteria goes in your pore making them zits

Explanation:

The spore form allows bacteria to exist under conditions not conducive to its life. It allows the bacteria to exist until the enviromental conditions favor its vegatative form when it can reproduce. Without the ability to form spores the bacteria would simply die out.

Explanation:The spore form allows bacteria to exist under conditions not conducive to its life. It allows the bacteria to exist until the enviromental conditions favor its vegatative form when it can reproduce. Without the ability to form spores the bacteria would simply die out.

Explanation:The spore form allows bacteria to exist under conditions not conducive to its life. It allows the bacteria to exist until the enviromental conditions favor its vegatative form when it can reproduce. Without the ability to form spores the bacteria would simply die out.

Explanation:The spore form allows bacteria to exist under conditions not conducive to its life. It allows the bacteria to exist until the enviromental conditions favor its vegatative form when it can reproduce. Without the ability to form spores the bacteria would simply die out.

Explanation:

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