Division of labor is the law in the organic world as in the industrial. Animals ___________ the lowest type, such as the amoeba, do not have separate organs for respiration, digestion, assimilation, elimination, etc. But in the ___________ forms each organ not only has its own specific work, but even within the same organ each part has its own particular function assigned. __________ we have seen that the _________ parts of the neurone probably perform different functions, the cells generating energy and the fibers ______________ it.
and the fibers ______________ it.

Options

A. transmit
B. transmits
C. transmitted
D. transmitting

Answer

D