21. Which of the following is NOT a reason for cell division in multicellular organisms?(A)growth(B)repair(C)nutrition(D)reproduction

22. Paracrine signaling(A)involves secreting cells acting on nearby target cells by discharging a local regulator into the extracellular fluid.(B)requires nerve cells to release a neurotransmitter into the synapse.(C)occurs only in paracrine yeast cells.(D)has been found in plants but not animals.(E)involves mating factors attaching to target cells and causing production of new paracrine cells.

21. Which of the following is NOT a reason for cell division in multicellular organisms?

(A)growth

(B)repair

(C)nutrition

(D)reproduction

相關試題

相關試卷