Amniotes differ from earlier vertebrates by
a. their large size.
b. their three-chambered heart.
c. their internal fertilization.
d. the possession of a slimy skin.
e. having external scales.
Answer: c
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Fill in the blank(s) with the appropriate word(s).
What results as the size of a population approaches the carrying capacity of its environment?
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If each skin cell of an organism has 24 chromosomes, its gametes must also have 24 chromosomes.
a. true b. false