Question
Download Solution PDFThe endosperm tissue of angiosperm is
This question was previously asked in
WBSSC SLST (Class 9-10) Life Science Official Paper Held On 04 Dec, 2016
Answer (Detailed Solution Below)
Option 3 : Triploid (3n)
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Detailed Solution
Download Solution PDFThe 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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