a chemical element or substance required in trace amounts for the normal growth and development of living organisms.
C because if there isn’t enough of something, more can be added but if there is max capacity, nothing can be added
Africa is the only place where giraffes live in the wild
D. Chromosomes
DNA in the nucleus is found in structures called chromosomes.
Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy.
anaerobic respiration also produces energy and uses glucose but it produces less energy and does not require oxygen.
