The endosperm tissue of angiosperm is

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WBSSC SLST (Class 9-10) Life Science Official Paper Held On 04 Dec, 2016
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  1. Diploid (2n)
  2. Haploid (n)
  3. Triploid (3n)
  4. Tetraploid (4n)..

Answer (Detailed Solution Below)

Option 3 : Triploid (3n)
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The correct answer is Triploid (3n)

Explanation:

  • Endosperm is a tissue in seed plants, particularly angiosperms, that provides nourishment to the developing embryo. It plays a crucial role in seed development and germination.
  • In angiosperms, the endosperm is formed as a result of double fertilization, a unique feature of flowering plants.
  • Double fertilization involves the fusion of one sperm cell with the egg cell to form the zygote (2n) and another sperm cell with two polar nuclei (n+n) to form the endosperm (3n).
  • The genetic composition of the endosperm is typically triploid (3n) in most angiosperms, meaning it contains three sets of chromosomes.

Additional Information:

  • The formation of triploid endosperm is a defining characteristic of angiosperms and distinguishes them from gymnosperms, where the endosperm is haploid (n) because it develops directly from the female gametophyte.
  • Endosperm development can be classified into three types: nuclear, cellular, and helobial, based on the pattern of cell division.
  • The endosperm tissue can be either consumed during embryo development or persist in mature seeds to provide nutrients during seed germination.

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