Author Question: The organs that develop first for a fetus during the embryonic period are the ____________, ... (Read 97 times)

michelleunicorn · **on:** Sep 11, 2018

The organs that develop first for a fetus during the embryonic period are the ____________, ____________, and _________________.

A. arms; legs; toes
B. brain; spinal cord; heart
C. brain, arms, spinal cord
D. legs, fingers, toes

Question 2

The formal beginning of pregnancy is

A. at conception.
B. when the blastocyst attaches to the uterine wall.
C. when a woman misses her first period.
D. when the developing organism becomes a fetus.