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Biochemical recognition systems within the stigma of a flowering plant prevent the pollen from a different species from developing a pollen tube and fertilizing its eggs. this is an example of what kind of reproductive isolation?
a. post-zygotic, temporal separationb. pre-zygotic, lock and keyc. pre-zygotic, behavioral isolationd. post-zygotic, ecological separatione. pre-zygotic, temporal separation
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