Which of these is a unique characteristic of mammals?
A) hair
B) four-chambered heart
C) extraembryonic membranes
D) endothermic
E) cephalization
Correct Answer:
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Q46: In 2004, fossil skeletons of a new
Q47: Which of these would be found in
Q48: Organisms that live in a marine environment
Q49: Which feature is present in cnidarians but
Q50: A leech would have all of the
Q52: Which feature places cnidarians as eumetazoans?
A) Cnidarians
Q53: Why are developmental biologists especially interested in
Q54: Nephridia are found in
A) jawless fishes.
B) echinoderms.
C)
Q55: Which of the following is a hominin?
A)
Q56: What are the key features of chordates?
A)
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