Over various spans of time, human populations have increased, decreased, or remained the same, and at both global and local levels. Which statement best explains this observation? A. Unlike other populations, the human population changes size because of specific choices of its members.
B. Unlike other populations, the human population has the ability to grow rapidly without limit.
C. Like other populations, the human population is affected by a variety of factors in the environment.
D. Like other populations, the human population increases and decreases in a cyclical pattern.

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:

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project