Which of the following is essential for birds to maintain their high metabolic rate?
A) skin that is used as a respiratory structure
B) a four-chambered heart, which maximizes oxygen delivery
C) embryonic development in a shelled amniotic egg
D) hollow bones, which decrease body mass
E) extraordinary coordination by a well-developed nervous system
Correct Answer:
Verified
Q47: A tadpole is a(n):
A)bony fish.
B)cartilaginous fish.
C)jawless fish.
D)amphibian.
E)invertebrate
Q48: Why don't reptilian embryos dry out in
Q49: Why can't amphibians be entirely terrestrial?
A)Their digestion
Q50: A terrestrial vertebrate that has scales and
Q51: Although they are mammals, monotremes lack:
A)ovaries in
Q53: Amphibians are not especially successful land dwellers
Q54: Which of the following is TRUE of
Q55: Why have reptiles successfully adapted to land?
A)They
Q56: To prevent dehydration, reptiles have:
A)embryos that lack
Q57: One adaptation that enables an animal to
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