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Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

Consider the following statements regarding pollination: Statement I: Complete autogamy is common in normal open chasmogamous flowers. Statement II: Xenogamy is the only type of pollination that brings genetically different types of pollen grains to the stigma. Choose the correct option:

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct

Correct answer · Option 4

Statement I is incorrect but Statement II is correct

Explanation

Statement I is incorrect because NCERT states: 'In a normal flower which opens and exposes the anthers and the stigma, complete autogamy is rather rare.' Statement II is correct as per NCERT.

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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