How many trophic levels are there in the following food chain?

grass → grasshopper → frog → snake

A. Five

B. Four

C. Three

D. Two

1. Describe the relationship between a meter, a millimeter, and a micrometer.

an blank pool contains all the alleles different members of a population have and can pass on to their offspring

Which best describes the lower body structures of humans and chimpanzees? a. The big toes of humans and chimpanzees are enlarged. b. The human foot has two arches, but the chimpanzee foot only has one. c.

Probably the main reason Africans, rather than Native Americans, became slaves in America was that? A. Indians passed North American diseases to the Europeans. B. Africans and Europeans shared immunities to Old World diseases. C.

A couple planning their family are aware that through the past three generations on the husband's side a substantial number of stillbirths have occurred, and several malformed babies were born who died early in childhood.

How do adolescents behave differently than adults? Are these differences universal or learned?

Which of the following is associated with plates sliding past each other? a. rifts b. subduction zones c. faults d. all of the above

Which of the following most accurately describes the process that must occur when working with research animals covered by U. S.

Female gametophytes in angiosperms are hidden and protected. Where are they found, and what are they called?

What does not contribute to wellness