Which Vertebrate Group Has a Three-Chambered Heart

Q21: Mammals have a _heart.

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.

Q78: All chordates have:<br>A)a ventral, hollow nerve cord.<br>B)a

Q80: Endothermic animals have four-chambered hearts. True or

Q83: What characteristics must an animal possess in

Q103: Why do amphibians need to live in

Q108: What characteristics differentiate monotremes from other mammals?