Why is it important for there to be variety in a population as it relates evolution?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Which codon is the code for the amino acid histidine (his)?

Which food could be transported in a galvanized metal container?