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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.