Help.. All mammals have external fertilization.
a. true
b. false
17
A cow is an example of a hoofed mammal.
a. true
b. false
18
The duckbill platypus and spiny anteater are the only two known
marsupials.
a. true
b. false
19
In this textbook, placental mammals are grouped according to where
they live, how they move, or how they eat.
a. true
b. false
20
Sloths are "toothless" mammals that have an armorlike coat.
a. true
b. false