What is the main purpose of sustainable agriculture? a. to feed a growing world without damaging the ecosystem b. to produce cheap and abundant food at a high cost c. to increase farming efficiency and profits d. to rely heavily on mechanization, pesticides, and fertilizers

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

What was photo 51 with rosalind franklin?