How does genetic variation and mutation play a role in natural selection?

2 answers:

7 0

Natural selection is a theory that states that those individuals who are best adapted to live in an area will survive and reproduce. Within a given population, there exists a normal degree of genetic variation that may or may not make an individual more adapted to the environment or, more importantly, changes in the environment. A species with a great deal of genetic variability is more likely to survive as a species in a changing environment than a species with limited variability.

Juliette [100K]3 years ago

5 0

Some mutations may be favorable for survival Ex. A genetic mutation can cause animals to be more resistant to illnesses.

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A(n) _____ specimen is the most concentrated urine.

Readme [11.4K]

A salt-concentrated specimen is the most concentrated urine. Urine is a waste that is already filtered by the kidneys. So, if the urine concentration or salts are high, that means that your kidney is not functioning properly. The urine test is the most common laboratory test especially for drug test.

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3 years ago

Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue. It typically hap

liq [111]

Answer:

Cell adhesion molecules would help white blood cells to stick to the wall of the blood vessel, so they can permeate across the wall and go into the underlying injured tissue.

Explanation:

The cell adhesion molecules, also called CAMs, are a type of cell adhesion proteins on the cell's surface, they take part in the binding of other types of cells and work together with the extracellular matrix in the process of cell adhesion.

Long story short, the protein helps cells stick together or to the surrounding tissues, thus helping on the maintenance of tissue structure and function. In fully grown mammals (including humans), CAMs play an important and key role in creating force and movement, thus assuring the organs are able to execute their function.

In their role as "molecular glue", CAMs are important participants in the cellular mechanisms of growth, contact inhibition, apoptosis and diapedesis, and when their behavior goes haywire, they are associated with afflictions going from frostbite to cancer.

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3 years ago

If a plant cell is placed in a salt water solution, where the concentration of water is greater in the solution than in the cell

-Dominant- [34]

Salt reduces the amount of water in a solution, because you're introducing another molecule. If the water concentrations are different, the water is going to want to reach an equilibrium to balance itself out. Because the salt solution has a higher water concentration than the plant cell, the water will move into the cell to try and balance out the concentrations. If the salt solution had a lower water concentration (water potential) then water would move from the cell into the solution.

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3 years ago

Some areas of an ocean are known as dead zones. These zones form when excess organic material decomposes. This increased decompo

JulijaS [17]

Answer:

Water Pollution

Explanation:

Dumping trash in the ocean and the smoke from factories goes in the water which makes the ocean more acidic and having less oxygen.

~Hope this Helps~

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3 years ago

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A molecular biologist is developing a computer model of the transcription of a gene into RNA. Which event should be included in

Firdavs [7]

Answer:

C. RNA polymerase binding to a region near the gene, called the promoter

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3 years ago