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What Happens When Pollen from One Species Lands on the Stigma

Question 19

Multiple Choice

What happens when pollen from one species lands on the stigma of a flower from another species?


A) The pollen tube typically forms and grows to the ovary, but then stops.
B) The pollen tube typically forms, but the sperm are killed.
C) The pollen tube typically forms, but the sperm cannot penetrate the egg.
D) The pollen tube typically does not develop.

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