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andriy [413]
3 years ago
11

Choose the best answer to complete the sentence. Directional selection can be distinguished from disruptive selection by _______

.
a. the elimination of extreme variations of traits
b. selection for two extreme variations of a trait
c. the preservation of gene frequencies
d. selection for one extreme variation of a trait
Biology
2 answers:
Stels [109]3 years ago
8 0

Answer:

The answer is D

Explanation:

I just took the test

Vinvika [58]3 years ago
6 0
I think the correct answer from the choices listed above is option A. Directional selection can be distinguished from disruptive selection by the elimination of extreme variations of traits. Directional selection is a natural selection where an extreme phenotype is favored than others.
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AleksAgata [21]

Answer:

Yes.

Explanation:

Yes, the statement is right because in chemical war, great damage occurs to all living organisms that has a bad effect on our environment. These chemicals are very dangerous so its usage in the war has long term effects on the environment and the organisms that live in it. Both the opponents receive great damage from this chemical war and the destruction of the natural beauty of the place vanished where this war occurs so this vanished of beauty and organisms is the defeat of both the opponents that fought this war.

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3 years ago
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A scientist is comparing the outer structure of an onion cell, structure X, to the outer structure of a human skin cell, structu
hammer [34]

Answer:

Structure X is only found in plant cells, and structure Y is found in plant and animal cells.  

Explanation:

The structure found on the outside of the onion cell is the cell wall, which is specific to plants. The structure found on the outside of the skin cell is the cell membrane, which is found on all cells.

Structure X is not living, and structure Y is living.  - this is false, both animal and plant cells are living.

Structure X can be found in some human cells, and structure Y can be found in some plant cells.  - this is false, the opposite is true.

Structure X is only found in plant cells, and structure Y is found in plant and animal cells.  - this is true structure X is the plant cell wall, and structure Y is the cell membrane

Structure X is semipermeable, and structure Y is selectively permeable. Semi-permeable and selectively permeable are essentially the same thing - it means the barrier allows some substances to pass through but not others.

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3 years ago
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4. Read the following sentence from the section "Are All Enzymes Proteins?"
ololo11 [35]

Answer:

D

Explanation:

Pretty sure that's the correct answer.

6 0
3 years ago
Human Immunodeficiency Virus (HIV) infects cells of the immune system.
nasty-shy [4]

Explanation:

Results in a decline in CD4+T cell numbers below the critical level, and loss of cell-mediated immunity. Therefore the body becomes progressively more susceptible to opportunistic infections and cancer.

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rewona [7]
<span>The san  Andreas fault

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7 0
4 years ago
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