Anthesis means.

Growth of pollen tube inside the carpel

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Dehiscence of anthers

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Opening of floral bud

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Emergence of anthers

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Solution

The correct option is B Opening of floral bud
Anthesis means the opening of floral buds, flowers with diurnal anthesis are generally bright in color to attract insects during day and flowers with nocturnal anthesis are generally white or less colorful to attract insects at night.
hence correct option is (A).

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Does anther absorb or loose water during dehiscence of anther?

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