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Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

The given diagram illustrates a mature dehisced anther. Which of the following events directly leads to the liberation of pollen grains as seen in the figure?

Question diagram
  1. A
    Hydration and swelling of the tapetum
  2. B
    Dehydration of the anther and breakdown of middle layers/stomium
  3. C
    Mitotic division of vegetative cells
  4. D
    Meiotic division of microspore tetrads
View Answer & Solution

Correct answer · Option B

Dehydration of the anther and breakdown of middle layers/stomium

Explanation

As the anthers mature and dehydrate, the microspores dissociate, the anther wall contracts and ruptures along the line of dehiscence, liberating pollen grains.

Related questions

Consider the following statements regarding seeds: Statement I: Albuminous seeds retain a part of the endosperm as it is not completely consumed during embryo development. Statement II: In non-albuminous seeds such as castor and maize, the endosperm is completely consumed during embryo development. In the light of the above statements, choose the correct answer:→Read the following statements about pollination by water: Statement I: Pollination by water is quite common in flowering plants and occurs in over 200 genera of both dicots and monocots. Statement II: The distribution of some bryophytes and pteridophytes is limited because of the requirement of water for transport of male gametes and fertilisation. Choose the correct option:→In the given three-dimensional cut section of an anther, which structure is responsible for the release of pollen grains upon maturity?→In angiosperms, what is the primary biological significance of the delay in zygote division until a certain amount of endosperm has developed?→
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