Amphibians were diverse and abundant in the lush swamp forests of the ________, which is sometimes referred to as the age of the amphibians.
A) Cambrian period
B) Pleistocene epoch
C) Mesozoic era
D) Carboniferous period
Correct Answer:
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Q12: A key derived character of sharks and
Q13: Which is characteristic of all vertebrates?
A) a
Q14: Which animals are ectothermic?
A) frogs and mammals
B)
Q15: Which statement best describes the current scientific
Q16: By far the largest number of extant
Q18: The duck-billed platypus and other monotremes differ
Q19: Which statement best describes how flight and
Q20: Mammals
A) evolved from birds.
B) all give birth
Q21: As an example of the relationship between
Q22: Which part of the body is likely
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