12. Regarding the reproductive cycle of angiosperms, which of the following statements is correct?
(A) A microspore mother cell undergoes mitosis to produce four microspores.
(B) A mature pollen grain (male gametophyte) ready for fertilization typically contains one tube cell and two sperm cells.
(C) The endosperm develops from the fusion of one sperm cell and two antipodal cells.
(D) The four megaspores produced by the meiosis of a megaspore mother cell usually all survive and develop into embryo sacs.
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統計: 尚無統計資料
統計: 尚無統計資料