Why do amphibians need a moist environment?
A) The gills of the adult won't work if they dry out.
B) Amphibians eat only aquatic organisms.
C) Their eggs have only a jelly-like coating that needs to stay moist.
D) Amphibians require a moist environment for their scales to develop.
E) Amphibians require a moist environment to support their body weight because their cartilaginous skeleton is weak.
Correct Answer:
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Q36: A lamprey is a(n):
A)bony fish.
B)cartilaginous fish.
C)jawless fish.
D)amphibian.
E)invertebrate
Q37: Chondrichthyes includes:
A)whales.
B)lampreys.
C)all fishes.
D)frogs.
E)sharks.
Q38: Fins composed of a web of skin
Q39: Cartilaginous fishes are characterized by:
A)bony skeletons.
B)four-chambered hearts.
C)lungs
Q40: Cartilaginous fishes differ from lampreys because they:
A)lack
Q42: Which characteristic do birds share with mammals?
A)a
Q43: The high body temperature of birds and
Q44: An animal that has a four-chambered heart,
Q45: Why are reptiles better adapted to land
Q46: Birds belong to a related group of
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