Amphibians are not especially successful land -dwellers because of their
A) two-chambered hearts.
B) production of a shelled amniotic egg.
C) reliance on moist skin for gas exchange.
D) choice of prey.
E) lungs that are supplemented by air sacs.
Correct Answer:
Verified
Q37: Why have populations of many ray -finned
Q38: A shark is a(n)
A) invertebrate chordate.
B) jawless
Q39: Lungfishes are classified as
A) cartilaginous fishes.
B) ray-finned
Q40: The skeletons of rays and skates are
Q41: Which vertebrate group has a three-chambered heart?
A)
Q43: Which of the following is TRUE of
Q44: To prevent dehydration, reptiles have
A) moist, slime-covered
Q45: Why donʹt reptilian embryos dry out in
Q46: Why canʹt amphibians be entirely terrestrial?
A) They
Q47: Birds belong to a related group of
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