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%

A pea plant has purple flowers. It has a genotype PP. Which of the following about the gene of flower color in the pea plant is true? The pea plant has only recessive alleles for the gene. The pea plant received the same allele from each parent.

Mary's doctor says that her inactive lifestyle has put her at risk of becoming obese. What else might Mary be facing if she continues to be inactive?

Autonomic nervous system sympathetic and parasympathetic

Some chains of carbon atoms bend when the carbon atoms:

Which is the first step of the scientific method?

Hypothesize about human impact on each of earth's systems

What would happen if the cells kept dividing and wouldn't Tay in interphase?

Which of these is not a function of DNA polymerase a) adding base pairs b) correcting errors c) unwinding the helix d) replicating the DNA strand

What Phylum do frogs and humans both belong?

Rocks pushed down into the earth melt, becoming molten rock.