試題詳解

29. Alternation of generations means
(A)One phase of the life cycle takes place on land and the other in water.
(B)One phase of the life cycle is photosynthetic and the other is heterotrophic.
(C)One phase of the life cycle is diploid and the other is haploid.
(D) One phase of the life cycle is unicellular and the other is multicellular.
(E) One phase of the life cycle is motile and the other is stationary.