When a population exhibits adaptation, it indicates that the population has responded to a pressure from the environment in a way that causes the prevalence of beneficial features to rise over time.
Natural selection only affects heritable traits in populations, favoring advantageous alleles and reducing the frequency of harmful alleles, a process known as adaptive evolution. Natural selection only affects heritable traits in populations. However, natural selection affects whole organisms rather than specific alleles. A person may have a genotype that is extremely advantageous and a phenotype that, for example, boosts fecundity, but if that person also contains an allele that causes a fatal childhood ailment, the fecundity phenotype won't be passed on to the next generation.
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"<span>B). the fear among U.S. policy makers that if communism succeeded in Vietnam, it would sweep through the rest of the region" is correct. This theory was at the core of the idea of containment. </span>
D. A place where some magma reaches Earth's surface.
The model were the sun is in the center of the solar system is called heliocentric.
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