- Exam
- NEET
- Year
- 2020
- Subject
- Botany
- Chapter
- Sexual Reproduction in Flowering Plants
NEET 2020 · Botany · Sexual Reproduction in Flowering Plants
The plant parts which consist of two generations one within the...
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
Options
- A(a), (b) and (c)
- B(c) and (d)
- C(a) and (d)
- D(a) only
Correct answer
C. (a) and (d)
Step-by-step 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.