Which chordate trait evolved first?
A) Skeleton hardened with calcium
B) Amniotic egg
C) Four limbs
D) Jaw
Correct Answer:
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Q22: What is the function of a fish's
Q29: What do sharks have in common with
Q30: Which is most closely related to the
Q31: Which reptiles are endothermic?
A)Crocodilians
B)Turtles
C)Snakes
D)Birds
Q32: Why can't amphibians survive far from water?
A)Their
Q33: Which is not a reptile?
A)Iguana
B)Bird
C)Salamander
D)All are reptiles.
Q37: All vertebrates have _.
A)hair
B)a skull
C)four limbs
D)scales
Q39: What does the expression "terrestrial tetrapod" mean?
A)Lives
Q40: Which of the following unique characteristics is
Q55: Which group of fishes gave rise to
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