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Which one of the following is surrounded by a callose wall?

Which one of the following is surrounded by a callose wall?

Options

(a) male gamete
(b) egg
(c) pollen grain
(d) microscope mother cell

Correct Answer:

microscope mother cell

Explanation:

MMC (megaspore mother cell) is surrounded by a callose wall, ovules generally differentiate single MMC in the micropylar region of MMC. It is a large cell containing desne cytoplasm and a prominent nucleus.

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