Which were the first vertebrates to appear on land?
A) amphibians
B) nonavian reptiles
C) birds
D) mammals
E) fish
Correct Answer:
Verified
Q57: Birds are classified as
A) reptiles.
B) mammals.
C) amphibians.
D)
Q58: You are given temperature data showing that
Q59: An animal that maintains its body temperature
Q60: Which is a characteristic of the phylum
Q61: Flatworms are very thin and can exchange
Q63: Which of the following is a characteristic
Q64: If you were eating sea urchin and
Q65: Segmentation is easy to observe in the
Q66: Flatworms have complete digestive tracts.
Q67: Some sponges have spicules made of calcium
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