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Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

Germ pores on the pollen grain wall are apertures where:

  1. A
    Intine is completely absent
  2. B
    Sporopollenin is absent
  3. C
    Cellulose and pectin are deposited heavily
  4. D
    The vegetative cell emerges during microsporogenesis
View Answer & Solution

Correct answer · Option B

Sporopollenin is absent

Explanation

Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent. Pollen tube emerges through one of these germ pores.

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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