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

答案:登入後查看
統計: A(16), B(7), C(7), D(95), E(32) #938832

詳解 (共 2 筆)

#2981894


(共 1 字,隱藏中)
前往觀看
11
1
#6530828
羊膜蛋 (amniotic egg) 是...
(共 235 字,隱藏中)
前往觀看
0
0