An embryo rests in a sac called the placenta, which is filled with amniotic fluid that cushions the ...

An embryo rests in a sac called the placenta, which is filled with amniotic fluid that cushions the embryo and maintains a constant temperature.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

Evolutionary theorists believe that psychological sex differences are natural and have been formed in response to challenges humans have faced over time.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 3

Once a zygote implants itself in the lining of the uterus, it becomes a fetus.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 4

Gender constancy is the knowledge that one is female or male.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 5

Only a single sperm cell can successfully make the journey up a woman's Fallopian tube to an unfertilized egg.
 
  a. True
  b. False
  Indicate whether the statement is true or false