問題詳情
33. Why is the amniotic egg considered an important evolutionary breakthrough?
(A)It has a shell that increases gas exchange.
(B)It prolongs embryonic development.
(C) It provides insulation to conserve heat.
(D)It allows deposition of eggs in a terrestrial environment.
(E)It allows internal fertilization to be replaced by external fertilization.
(A)It has a shell that increases gas exchange.
(B)It prolongs embryonic development.
(C) It provides insulation to conserve heat.
(D)It allows deposition of eggs in a terrestrial environment.
(E)It allows internal fertilization to be replaced by external fertilization.
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