26. Self-incompatibility most importantly involves:
(A) A biochemical mechanism on the part of the pistil.
(B) The genetic identities of pistil and pollen.
(C) Morphological difference between flowers.
(D) A and B.
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統計: A(0), B(0), C(0), D(1), E(0) #3477531
統計: A(0), B(0), C(0), D(1), E(0) #3477531