An Animal Without a Vertebral Column Has an Unprotected Notochord

Q50: _are mammals that lay eggs.)

Q66: In all chordates, the notochord:<br>A)appears only in

Q67: Why are reptiles better adapted to land

Q71: Mammals have the most complex nervous system

Q72: Which vertebrate group is the most diverse?<br>A)Actinopterygii<br>B)Actinistia<br>C)Chondrichthyes<br>D)Mammalia<br>E)Reptilia

Q73: This animal is classified as a: <img

Q74: Lancelets live in:<br>A)the sea.<br>B)sulfur springs.<br>C)fresh water.<br>D)deserts.<br>E)treetops.

Q106: Why are birds classified as reptiles?

Q108: What characteristics differentiate monotremes from other mammals?

Q114: During embryonic development, all chordates have a