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