The animal kingdom is made up of invertebrates (animals
without bones) and vertebrates (animals with bones).
Vertebrates are divided into five classes, or subphyla.
These five classes are mammals, birds, fish, reptiles, and
amphibians. Mammals are warm blooded; they maintain a
consistent body temperature.
o
Which of the following descriptions explains what warm blooded means?
o
A. Animals with bones
O
B. Maintain a consistent body temperature
o
C. Mammals and humans
D. Animals without bones
