Natural selection occurs very quickly- usually in a matter of a few years.
True OR False

True.

Explanation:

Natural selection is how animals and others are picked off, the weakest dying first. It can take years at the most.

true

Explanation: step by step

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.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: