Author Question: The embryonic phase differs from the pre-embryonic phase because A. the embryonic phase occurs ... (Read 111 times)

lb_gilbert · **on:** Aug 20, 2018

The embryonic phase differs from the pre-embryonic phase because

A. the embryonic phase occurs during the first 2 weeks of pregnancy, while the pre-embryonic phase describes the period from 2 to 8 weeks of pregnancy.
B. the embryonic phase is initiated by zygote formation, whereas the pre-embryonic phase is initiated by blastocyst formation.
C. the embryonic phase begins at week 9 of pregnancy, while the pre-embryonic phase begins at week 2.
D. organ formation and development begin during the embryonic phase, whereas blastocyst formation occurs in the pre-embryonic phase.

Question 2

When the body achieves physical maturity,

A. growth ceases and cells immediately begin to die.
B. growth continues but at a much slower rate.
C. growth accelerates due to rapid cell turnover.
D. growth ceases and the body enters a maintenance phase.