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Question

In gymnosperms, pollination is exclusively by
  1. Water
  2. Animals
  3. Insects
  4. Wind

A
Animals
B
Wind
C
Insects
D
Water
Solution
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In gymnosperms, the microspores or pollen grains are wind borne and enter the ovule directly through the micropylar canal. The micropyle in almost all gymnosperms secretes a sugary exudate called as the 'pollination drop' which not only receives the pollen grains but also transports them to nucellus of ovule.
So, the correct answer is 'Wind'

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