Heartbeat, digestion, respiration, and elimination of wastes are carried out by organ systems close to the central axis. These functions, close to the center of the body, operate or are ready to operate when the child is born. What principle of development does this represent?

Explanation:

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

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