describes organisms migrating to and from a population, changing its allele frequencies

What does it mean for a cell membrane to be selectively permable

The instructions for making proteins come originally from

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."