Anthesis is

Opening of floral bud

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Development of anthers

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Maturation of anthers

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Reception of pollen by stigma

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Solution

The correct option is A Opening of floral bud
The period of anthesis refers to the opening of the floral buds. The flower becomes functional at the time of anthesis. It brings about the attraction of the pollinators, dehiscence of the anthers, receptivity of the stigma, elongation of the style etc.
Hence, the correct answer is 'Opening of floral bud'

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Similar questions

Q. Self-incompatibility prevents pollen tube formation by pollen grains on the stigma of the__________.

Question 15
Length of pollen tube depends on the distance between

(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Q. The phenomenon of pollen grains being transferred to stigma by air is called

The length of the pollen tube depends on the distance between :
(a) pollen grain and the upper surface of the stigma
(b) pollen grain on the upper surface of stigma and ovule
(c) pollen grain in anther and the upper surface of the stigma
(d) the upper surface of stigma and lower part of the style

Q. Draw the diagram showing the germination of pollen on stigma and label the following parts (i) stigma (ii) pollen tube

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