Class 12th Biology 2018 Set1 Delhi Board Paper Solution
Question 24
Describe any two devices in a flowering plant which prevent both autogamy and geitonogamy.
Answer
Two devices in flowering plant which prevent both autogamy and geitonogamy are:
1. Dichogamy: The condition in which the stamen and stigma mature at different time in a bisexual flower.
2. Protandry: In bisexual flower to prevent self fertilisation, the another mature. earlier than the stigma, so no fertilisation occur.
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