When the arteriovenous anastomoses are constricted by sympathetic nerve fibers, the superficial capillary loops are

a. engorged with blood.

b. collapsed.

c. by passed.

d. not affected?

Which of the following is a cause of global warming? the coriolis effect biogeochemical cycles the greenhouse effect oceanic currents

In the Northern Hemisphere, during which season does the Earth reach its greatest distance from the Sun?

Who first introduced the idea that the Sun is the center of the universe?

Which of the following statements is true? Natural selection is the oldest form of genetic engineering. Recombinant DNA combines genes from two different organisms. Selective breeding is controversial because it creates sterile offspring.

List the organization of living things from the most inclusive to the least inclusive.

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.

When blockages in the bloodstream read the Brian it can cause blank?

A gazelle is born with slightly longer legs which allow it to run faster than the other gazelles in the herd. This adaptation came may have come about because a. the gazelle needed to be able to run faster. b.

In a population of deer mice, the allele for white hair is recessive and the allele for brown hair is dominant.

What makes a molecule a saturated fat?