試題詳解

16. For a typical flowering plant, the first cell of the triploid (3n) endosperm is formed from_______.
(A) one sperm fused with two antipodal cells
(B) two sperm fused with the egg
(C) one sperm fused with the synergid
(D) two sperm fused with a synergid
(E) one sperm fused with the endosperm mother cell