In angiosperms, the functional megaspore undergoes mitotic divisions to form the embryo sac, which typically contains:
A. 8 cells, 8 nuclei
B. 4 cells, 4 nuclei
C. 7 cells, 8 nuclei
D. 7 cells, 7 nuclei
Answer: Option C
Solution (By JKSSB Mock Tests)
The female gametophyte (embryo sac) in angiosperms is typically monosporic (develops from one functional megaspore). The megaspore undergoes three successive mitotic divisions to form an 8-nucleate, 7-celled structure. This includes 3 antipodal cells, 2 synergids, 1 egg cell, and 1 central cell containing 2 polar nuclei. Exam tip: Remember '8 nuclei, 7 cells' because the central cell has 2 nuclei but is 1 cell.
Explanation:
ICZN stands for the International Commission on Zoological Nomenclature. It is the organization that establishes and maintains the International Code of Zoological Nomenclature, which provides the universal rules for naming animals to ensure stability and universality in scientific names.
Explanation:
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Explanation:
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