Achange in the gene pool of a population due to chance is called

layer 3 is younger than layer 6.

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )

answer; (b) clear with a slight blue tint;