Which best describes genetic drift?
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a. changes caused by male competition
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b. changes to polygenic traits
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c. random changes in allele frequency
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d. a type of artificial selection

" Random changes in allele frequency" best describes genetic drift

Explanation:

The process where the allele frequencies within the population change accidentally alone results in sampling error from one generation to another. It is random process which further leads to large change in population in short time period . Random change is the frequency present in the existing gene variant in the population as a result of 'random sampling'. The allele frequencies are the reflection of the genetic diversity. It can also be due to the mutations that have been introduced into the population.

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: