Many, Though Not All, Mollusks Have a Shell

Q29: Most animals fall into one of how

Q30: Which of the following phyla is the

Q31: Which of the following best describes cnidarians?<br>A)They

Q32: All vertebrates have _.<br>A)hair and a backbone<br>B)a

Q33: How might an early primate's environment lead

Q35: All mammals _.<br>A)give birth to live young<br>B)are

Q36: Parasites have often been described incorrectly as

Q37: Which chordate trait evolved first?<br>A)Calcium-hardened skeleton<br>B)Amniotic egg<br>C)Four

Q38: What is an amniotic egg?<br>A)A type of

Q39: Humans belong to which subgroup of mammals?<br>A)Marsupials<br>B)Monotremes<br>C)Eutherians<br>D)Cetaceans