Author Question: ____________________ explanations of aggression focus on environmental factors such as reinforcement ... (Read 33 times)

fnuegbu · **on:** Jun 22, 2018

___________________ _ explanations of aggression focus on environmental factors such as reinforcement and observational learning.

Fill in the blank(s) with correct word

Question 2

The ___________ is the structure that permits the embryo (and, later on, the fetus) to exchange nutrients and wastes with the mother.

a. amniotic sac c. amniotic fluid
b. placenta d. neural tube