Mammals are the only vertebrates to possess
A) hair.
B) single loop circulation.
C) a four-chambered heart with a pulmonary circuit.
D) endothermy.
E) live birth.
Correct Answer:
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Q27: Amphibians are not completely free to live
Q28: Reptiles can maintain their internal body temperature
Q29: Which of the following living reptiles care
Q30: Small,fishlike marine chordates,pointed at both ends with
Q31: Mammals are thought to have evolved from
A)thecodonts.
B)therapsids.
C)dinosaurs.
D)marsupials.
E)archosaurs.
Q33: Which of the following is considered the
Q34: Birds are different from reptiles in all
Q35: Birds,like mammals,can regulate their body temperatures within
Q36: It is generally accepted that the vertebrates
Q37: The changes that were necessary to cope
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