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labwork [276]
3 years ago
15

Why is phenotypic variation necessary for natural selection

Biology
1 answer:
Hitman42 [59]3 years ago
6 0

Answer:

Phenotypic variation is the variation which appears in the phenotype or morphology of the organism. Natural selection is the mechanism of evolution in which the adapated organism to the environment is selected or highly favoured during the course of evolution.

A phenotype is the results of the genetic change which to be established in a population has to be passed on to the generation.

Since variation in phenotypic traits allows the organism to leave indifferent circumstances therefore phenotypic variation proves essential condition to natural selection.

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After Meiosis 2, how many chromosomes will I have in each cell if I start with 48 chromosomes in my original parent cell? Is the
Sophie [7]

Answer:

you would have 24 chromosomes  and it would be haploid

Explanation:

5 0
3 years ago
True or False: Meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number.
AleksandrR [38]

Answer:

True

Explanation:

Meiosis is the kind of cell division that results in the production of daughter cells with each cell having half number of chromosomes as the parent cell. Meiosis is the cell division employed by reproductive cells to produce gametes/sex cells. Meiosis occurs in two stages i.e. Meiosis I and II. The chromosome number reduces by half in gametes in order to ensure that after fertilization of both male and female gamete, the resulting organism has the correct set of chromosomes. e.g diploid organism produces haploid gametes which fuses to produce a diploid organism again.

Mitosis is another type of cell division that results in identical daughter cells. They are identical in the sense that they possess the same number of chromosomes as the parent cell that divided. For example, a diploid cell undergoes mitosis to produce two diploid daughter cells.

8 0
3 years ago
Functions of astrocytes include all of the following except
Neporo4naja [7]

The question is incomplete. The complete question is as follows:

Functions of astrocytes include all of the following, except

A) performing repairs in damaged neural tissue.

B) guiding neuron development.

C) functioning in action potential transmission.

D) maintaining the blood-brain barrier.

E) creating a three-dimensional framework for the CNS.

Answer:

Functioning in action potential transmission.

Explanation:

Astrocytes may be defined as the glial type star shaped cells present in the central nervous system. They envelope the synapse and can function with millions of neuron at a time.

Astrocytes are involved in the structural support in the brain and can repair the damaged and wear nerves tissue. Their main function is acting as blood brain barrier. The action potential transmission is mainly done by neurons and not by the astrocytes cells.

Thus, the correct answer is option (c).

7 0
3 years ago
The largest component of the neuron, which coordinates the information-processing tasks and keeps the cell alive, is the: axon.
mylen [45]
The answer to that question is Cell Body
8 0
3 years ago
What evidence is there to show that continental glaciers once covered South Africa?
ankoles [38]

Answer:

Glacial striation is your answer

8 0
1 year ago
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