alleryHow does a pistil recognise compatible pollen?
ABy counting pollen grains
BBy detecting petal colour
CThrough chemical pollen–pistil interactions
DBy measuring ovule size
Answer & Solution
Correct answer: C. Through chemical pollen–pistil interactions
Chemical components of pollen interact with those of the pistil. Recognition promotes germination and tube growth for compatible pollen or inhibits these events for incompatible pollen.
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