There are several ways selection can affect population variation:
stabilizing selection
directional selection
diversifying selection
frequency-dependent selection
sexual selection
As natural selection influences the allele frequencies in a population, individuals can either become more or less genetically similar and the phenotypes displayed can become more similar or more disparate. In the end, natural selection cannot produce perfect organisms from scratch, it can only generate populations that are better adapted to survive and successfully reproduce in their environments through the aforementioned selections.
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The jokester, hehe
Blocked or clogged arteries typically accurate when a substance called plaque builds up on your artery walls and significantly reduces your normal blood flow.high cholesterol is a major risk factor for plaque to build up.
A series of cell divisions that result in the formation of an embryo is called mitosis.
