What Is an Invertebrate

Q32: What is the prehistoric overkill hypothesis, and

Q33: The first jawed fish were the:<br>A) placoderms.<br>B)

Q34: The sail-like fin on the pelycosaur may

Q35: Briefly state some of the problems that

Q38: The adaptive radiation of mammals began following

Q39: Gymnosperms are:<br>A) flowering, seed-bearing plants.<br>B) nonvascular, flowerless

Q40: The fin-back reptiles are called _, and

Q41: What was the importance of the therapsids?

Q42: The duck-billed dinosaurs belonged to the _

Q66: The _ dinosaurs are also known as