In _________, the young are born in an extremely immature state and complete development in their mother's external pouch.
a. placental mammals
b. monotremes
c. marsupials
d. reptiles
e. none of these
Answer: C
In _________, the young are born in an extremely immature state and complete development in their mother's external pouch.
a. placental mammals
b. monotremes
c. marsupials
d. reptiles
e. none of these