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Sexual Reproduction in Flowering Plants
Female Gametophyte (Embryo Sac)
2 questions from 2 papers, each with its answer.
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All Questions
2025 1 question
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Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.Reason (R): The egg apparatus has 2 polar nuclei.
Assertion is true; Reason is false because polar nuclei reside in the large central cell, not in the egg apparatus.
A mature angiosperm female gametophyte has 7 cells and 8 nuclei (3 antipodals, 1 central cell with 2 polar nuclei, and a 3-celled egg apparatus comprising 1 egg cell and 2 synergids). The polar nuclei are in the central cell, not the egg apparatus, so Reason is false.
2021 1 question
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A typical angiosperm embryo sac at maturity is: