Pollen from a Plant with the S₁S₂ Genotype Is Recognized

Multiple Choice

Pollen from a plant with the S₁S₂ genotype is recognized and allowed to germinate on the stigma of the same plant with the S₁S₂ genotype.According to the S-system hypothesis,this indicates that the plant is _____.

A) self-compatible and can self-pollinate.
B) self-compatible and must cross-pollinate.
C) self-incompatible and can self-pollinate.
D) self-incompatible and must cross-pollinate.