Suppose That 100 Pollen Grains Land on a Stigma, and 50

question 58

Multiple Choice

Suppose that 100 pollen grains land on a stigma, and 50 mature seeds are formed in the fruit. What does this indicate about the pollination process and success?

• A) 50% success: 100 pollen grains grew to 50 ovules, and double fertilisation occurred.
• B) 50% success: Evidently, only 50 sperm pollinated 50 anthers.
• C) 50% success: 50 sperm fertilised 50 eggs, and 50 sperm fused with 50 polar nuclei.
• D) 50% success: 50 sperm fertilised 50 eggs, and 50 sperm fused with 100 polar nuclei.

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