The Most Diverse Group of Placental Mammals are the ____

Question

The most diverse group of placental mammals are the ____.  
A) bats
B) carnivores
C) rodents
D) moles and shrews
E) whales and dolphins

Accepted Answer

Rodents are the most diverse group of placental mammals, comprising over 40% of mammalian species. They are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws, and they inhabit a wide range of different ecosystems across the world.