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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
Fertilisation is essential for production of seed, but in some angiosperms, seeds develop without fertilisation.
Explain the two ways by which seeds develop without fertilisation.
✓

Answer

Two ways by which seeds develop without fertilisation are:
  1. In some species, the diploid (2n) egg cell is formed without reduction division and develops into embryo without fertilisation.
  2. In many varieties of Citrus and mango fruits, some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and then develop into embryos.

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