Achange in the frequency of any mutant allele in a population most likely depends on the

The answer is ‘the degree of dominance of the selected allele with respect to fitness’. If natural selection favors the mutation, the allelic frequency will increase in the population. However, if the mutation is disadvantageous to the individuals with it, the allelic frequency will decrease and probably become lost.  

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.