Author Question: Animals with internal backbones, including all fish, amphibians, birds, reptiles, and mammals are ... (Read 121 times)

lbcchick · **on:** Jul 31, 2018

Animals with internal backbones, including all fish, amphibians, birds, reptiles, and mammals are called ________________.

Fill in the blank(s) with the appropriate word(s).

Question 2

_______________animals have no internal backbone, and their skeleton is usually located on the exterior of the body rather than the interior.

Fill in the blank(s) with the appropriate word(s).