Once fertilization has occurred, the activities of development begin. The first such activity is_________ .
A)the formation of organ systems
B)cellular specialization
C)an increase in cell number

Question

Quizplus · Accepted Answer

The first activity following fertilization is an increase in cell number, a process known as cleavage. This involves rapid cell divisions without growth, leading to the formation of a multicellular embryo from the zygote.

Once Fertilization Has Occurred, the Activities of Development Begin