In the majority of angiosperms:

In the majority of angiosperms:
  1. Egg has a filiform apparatus
  2. There are numerous antipodal cells
  3. Reduction division occurs in the megaspore
  4. A small central cell is present in the embryo sac

Solution

MEGASPOROGENESIS:
Definition: The process of formation of megaspores from megaspore mother cell (MMC) is called megasporogenesis.
i) Embryosac generally develop from a single megaspore that differentiate from a single megaspore mother cell (MMC) in the micropylar region of the nucellus.
ii) MMC is a large cell containing dense cytoplasm and a prominent nucleus.
iii) The MMC undergoes meiosis and forms a linear tetrad of four haploid megaspores. Out of which one remains functional (chalazal end) and three degenerate (micropylar end).

Asked in: NEET 2016 (Phase 2)

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