Answer:
B) genetic variation needed for a population to evolve
Explanation:
Mutations are important because they bring about the genetic variation needed for a population to evolve.
- Mutation brings about changes in the DNA sequence of an organism.
- Most times, mutation results when an organism tries to adapt and evolve to unfavorable conditions.
- Mutation can originate from mistakes in DNA sequencing.
- It can also be due to environmental influences.
A.
Mitosis is essentially creating more of the same type of cell (more diploid cells). Meiosis occurs in sex cells or gametes and produces cells witht he half the amount of chromosomes (haploid).
<span>This is the acquisition stage. During this stage, the learned behavior is being taught and the learner begins to link the stimulus with the response. After a time, the behavior does not need to be linked to the stimulus (the shock) for it to take place and it can automatically occur whenever the light is presented.</span>
<span>Polygenetic inheritance
This type of inheritance is controlled by a group of epi-static genes which regulate expression of one phenotypic trait, which is hair color in this case. Such genes are often large in quantity but small in effect. These genes could also be pleiotropic as well. Polygenes also exist in other organisms apart from humans. </span><span>
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Autotrophs make their own food from the sun so most energy starts there
