Question

Genetic variations are the raw material for evolution. natural selection cannot act upon these variations unless which factor is present?

a.the genetic variations produce only unfavorable characteristics
b.the genetic variations produce only favorable characteristics
c.the genetic variations are found in fossil records of the population
d.the genetic variations are in the phenotype of the organism

Answer 1

To act upon genetic variations, natural selection requires that these variations are expressed in the organism's phenotype, thereby affecting its survival and reproduction.

Step-by-step explanation:

Genetic variations are essential for the process of evolution. For natural selection to act upon these variations, the key factor is that the genetic variations must be expressed in the phenotype of the organism.

Phenotypic expression of genetic variations means that the differences caused by the genes can influence an organism's chances of survival and reproduction within a given environment. Thus, the correct answer to the student's question is: d. the genetic variations are in the phenotype of the organism.

Answer 2

I believe it is D. the genetic variations are in the phenotype of the organism. The reason why I say this is because the phenotype is the physically noticeable characteristics in an organism, this allows them to mutate differently and only the ones who are fit enough and have the best phenotypes will survive.