The plant parts which consist of two generations one within the other: (a) Pollen grains inside the anther…

The plant parts which consist of two generations one within the other:

(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule

  1. (a), (b) and (c)
  2. (c) and (d)
  3. (a) and (d)
  4. (a) only

Solution

A typical anther is bilobed. The two anther lobes are separated by a deep groove in front and are attached by a band of sterile vasculature tissue called connective. Each anther is a four sided tetragonal structure consisting of four microsporangia located at corners, two in each lobe. Hence, a mature anther is tetrasporangiate. Microsporangia form pollen sacs which on maturity become filled with pollen grains.

Embryo sac: It is also called as the female gametophyte and is located in the nucellus. An ovule generally has a single embryo sac formed from a megaspore.

Asked in: NEET 2020 (Phase 1)

Practice more Sexual Reproduction in Flowering Plants questions on Aicharya