What is the term for the rapid expansion and diversification of groups of organisms into newly available ecological niches?
a. generalization
b. homology
c. parallel evolution
d. adaptive radiation
e. specialization
Question 2
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. adaptive radiation