A hypodermal cell of the nucellus enlarges to form an archesporia cell which transformed into a megaspore mother cell. Each diploid megaspore mother cell undergoes meiosis to form linear tetrad of megaspores. Three megaspores degenerate and remaining functional one enlarges at the chalazal end. Related Theory The functional megaspore undergoes three subsequent mitotic divisions and forms the eight nuclei. The eight nuclei arrange themselves into three groups. Three nuclei migrate at the micropylar end and forms the egg apparatus, consisting of two synergids and a round egg cell. The other three nuclei arrange themselves at the chalazal end and form the antipodal cells. The remaining two nuclei come together as polar nuclei in the centre of the embryo sac. All the cells of the embryo sac are haploid.
Megaspores are produced from the megaspore mother cells after:
NEET UG 2013 — Botany Sexual Reproduction in Flowering Plants
Megaspores are produced from the megaspore mother cells after:
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
mitotic division
- B
formation of thick wall
- C
differentiation
- D
meiotic division.
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
NEET UG Sexual Reproduction in Flowering Plants in other years
More NEET UG Sexual Reproduction in Flowering Plants questions
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R) : The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below :
How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R) : Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R) : The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below:
Identify the correct description about the given figure: 
Other Botany topics for NEET UG
Keep practicing Sexual Reproduction in Flowering Plants
Work through every NEET UG Sexual Reproduction in Flowering Plants PYQ, year by year.