NEET (UG) · Botany, Class 12
Sexual Reproduction in Flowering Plants: NEET PYQ, 2018–2026
Sexual Reproduction in Flowering Plants (Botany, Class 12) has been asked 26 times in the 7 NEET papers from 2018, 2020, 2021, 2023, 2024, 2025 and 2026: about 3.7 questions a paper, 8% of all Botany questions. It is the 4th most-asked of 17 Botany chapters. NEET 2026 had 4 from it. Last checked 28 October 2026.
Questions per paper
Year by year.
| Year | Questions |
|---|---|
| 2018 | 4 |
| 2020 | 3 |
| 2021 | 3 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 6 |
| 2026 | 4 |
From 2021 to 2024 each paper had 200 questions (a Section B with a choice); the others had 180.
Inside the chapter
Topics asked most.
- Pollination and outbreeding devices8
- Megasporogenesis6
- Microsporogenesis5
- Seed and fruit development4
- Double fertilisation3
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10 Sexual Reproduction in Flowering Plants questions to practise.
Our own questions, written in the NEET pattern and checked, each with an explanation. Pick an option to see the answer.
Q1 · Botany · Sexual Reproduction in Flowering Plants
Which trait of flowers pollinated by bats (chiropterophily) is most characteristic?
Answer: (A)
Bats are nocturnal and depend on olfaction, so the flowers they visit open at night, have strong odours, and are large and sturdy to bear the weight of a bat. Their colour is dull or white because bats cannot rely on bright colour at night. Red colour and daytime opening point to birds or bees, not bats.
Q2 · Botany · Sexual Reproduction in Flowering Plants
In an angiosperm ovule, from which cell does the megaspore mother cell (MMC) arise before megasporogenesis begins?
Answer: (A)
The nucellus is the megasporangium. One hypodermal (sub-epidermal) cell, usually near the micropyle, enlarges and becomes the megaspore mother cell. Remember that the integuments enclose the nucellus and do not give rise to the MMC.
Q3 · Botany · Sexual Reproduction in Flowering Plants
A diploid plant species has 2n = 22 chromosomes in its somatic cells. How many chromosomes are present in the primary endosperm nucleus of this species?
Answer: (A)
Principle: in double fertilisation one male gamete fuses with the haploid egg to form the diploid zygote, and the second fuses with the two haploid polar nuclei of the central cell to form the triploid primary endosperm nucleus. Apply: n = 11 for a 2n = 22 species, so the endosperm has 3n = 33 chromosomes. Remember that the central cell contributes two haploid nuclei, which is why the ploidy is three times the haploid number.
Q4 · Botany · Sexual Reproduction in Flowering Plants
Diplospory is a type of apomixis in which the embryo sac develops from
Answer: (A)
Diplospory is a form of apomixis in which the megaspore mother cell is diploid and does not undergo meiosis. It therefore gives rise to an unreduced, diploid embryo sac. Students who confuse it with apospory, where the embryo sac comes from somatic cells, have the wrong type.
Q5 · Botany · Sexual Reproduction in Flowering Plants
In apospory, an embryo sac develops without meiosis. Which cell of the ovule gives rise to this unreduced embryo sac?
Answer: (A)
Apomixis can occur through two routes that both skip meiosis. In diplospory the megaspore mother cell itself forms an unreduced embryo sac. In apospory the embryo sac forms from a somatic nucellar or integumentary cell, which is a different source. Identifying the origin cell is the key distinction, and it is the one that separates the two pathways.
Q6 · Botany · Sexual Reproduction in Flowering Plants
The seed coat of a dicot seed develops from the integuments of the ovule. Which statement correctly identifies the origin of the two layers of the seed coat?
Answer: (A)
Principle: the ovule has two integuments that surround the nucellus; after fertilisation the outer integument forms the hard, protective testa and the inner integument forms the thin tegmen. Apply: identify which integument becomes which layer, then rule out the nucellus and the ovary wall as sources of the seed coat.
Q7 · Botany · Sexual Reproduction in Flowering Plants
After their release, the pollen grains of rice and wheat remain viable for about:
Answer: (C)
How long pollen stays viable varies: in rice and wheat pollen grains lose viability within 30 minutes of release, while in some members of Rosaceae, Leguminosae and Solanaceae they stay viable for months. Pollen can be stored for years in liquid nitrogen at −196 °C.
Q8 · Botany · Sexual Reproduction in Flowering Plants
In apospory, an embryo sac develops from a cell that is not the megaspore mother cell. Which cell type is the source of the embryo sac in apospory?
Answer: (C)
Apospory differs from diplospory in its origin. The embryo sac arises from a somatic nucellar or integumentary cell, not from the megaspore mother cell. Because no meiosis occurs, the sac is 2n. Students often confuse the origin with the ploidy, so keep both features in mind.
Q9 · Botany · Sexual Reproduction in Flowering Plants
In a haploid (n) embryo sac, an embryo develops from a synergid cell without any fusion with a male gamete. What is the ploidy of this embryo?
Answer: (A)
Apogamy: an embryo develops from a cell other than the egg, such as a synergid, with no gamete fusion. The embryo inherits the ploidy of the cell it arises from. A haploid sac gives a haploid embryo. Ploidy is set by the source cell, not by a diploid sporophyte's default.
Q10 · Botany · Sexual Reproduction in Flowering Plants
A mature pollen grain at the time of shedding contains a vegetative cell and a generative cell. Which statement correctly describes the difference between these two cells?
Answer: (A)
The pollen grain at shedding has two cells. The large vegetative cell has abundant starch and other food reserves, and it grows into the pollen tube during germination. The small generative cell has dense cytoplasm and a condensed nucleus, and it divides to form two male gametes. Keep the functions straight: vegetative cell for food and tube formation, generative cell for gamete formation.
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All 26 real NEET questions from Sexual Reproduction in Flowering Plants.
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About Sexual Reproduction in Flowering Plants in NEET.
How many questions come from Sexual Reproduction in Flowering Plants in NEET?
Sexual Reproduction in Flowering Plants (Botany, Class 12) has been asked 26 times in the 7 NEET papers from 2018, 2020, 2021, 2023, 2024, 2025 and 2026: about 3.7 questions a paper, 8% of all Botany questions. It is the 4th most-asked of 17 Botany chapters. NEET 2026 had 4 from it.
Which topics of Sexual Reproduction in Flowering Plants are asked most in NEET?
Pollination and outbreeding devices (8), Megasporogenesis (6), Microsporogenesis (5), Seed and fruit development (4), counted over the papers from 2018–2026.
Is Sexual Reproduction in Flowering Plants important for NEET 2027?
It is in the syllabus in force, so it can be asked. By past papers it ranks 4 of 17 in Botany; use that to decide how much time it gets, not whether to study it.
Where can I solve Sexual Reproduction in Flowering Plants NEET previous year questions?
On Nikaalle, free: sign up and practise every past NEET question from Sexual Reproduction in Flowering Plants with an explanation for each, or sit the full papers timed. The ten questions on this page are our own, written in the same pattern.
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