A food chain consists of grass, cows, and humans. If the grass

field produces 86,000 kJm-2 year-1 of energy and the cows

contain 18,700 kJm-2 year-1 of energy then what is the trophic

efficiency?

A: 5%

B: 78%

C: 22%

D: 33%

Which pricnipal energy level contains only s and p sublevels?

In those parts of equatorial Africa where the malaria parasite is most common, the sickle-cell allele constitutes 20% of the β hemoglobin alleles in the human gene pool.

Name the organelle that you see in the plant cell that you did not see in the animal cell

Why planets near opposition rise in the east?

What is parenthood or society in a world that includes clones?

Suppose that two ancient types of plants, one that grows in the winter and one that grows in the summer, appear together in the fossil record for two periods in the geologic time scale.

Did alexander graham bell what to college

How are traits inherited by offspring?

In homeotic mutants: Group of answer choices one body structure is missing. one body structure has been changed into another. one body structure has been duplicated. one body structure has significantly increased in size. the organism is infertile.

What effect of acid rain on a ecosystem is