Question

Distinguish between unitegmic and bitegmic ovule

Answer 1

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In seed plants, the ovule ("small egg") is the structure that gives rise to and contains the female reproductive cells. ________It consists of three parts: The integument(s), forming its outer layer(s), the nucellus (or remnant of the megasporangium),________and the female gametophyte (formed from a haploid megaspore) in its center._________The female gametophyte — specifically termed a megagametophyte— is also called the embryo sac in angiosperms._________The megagametophyte produces an egg cell (or several in some groups) for the purpose of fertilization.____

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Answer 2

Answer:

An integument is a protective layer of cells surrounding the ovule. Gymnosperms typically have one integument (unitegmic) while angiosperms typically have two integuments (bitegmic).