Sexual Reproduction in Flowering PlantsNEET MCQs with solutions
Sexual Reproduction in Flowering Plants is one of NEET Biology's highest-yield chapters. From microsporogenesis to double fertilisation, every diagram in NCERT is fair game. Questions test your understanding of the flower structure, pollination mechanisms, embryo development and seed formation — master these and you secure easy marks.
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Tap an option to check it. Questions from every NCERT topic in this chapter, from easy to hard.
Q1Grand Test
Which pair of developmental fates after fertilisation in angiosperms is correctly matched?
Not quite — the answer is B.
The zygote formed by syngamy develops into the embryo. The ovule as a whole develops into the seed. The ovary wall (pericarp) develops into the fruit wall, not the ovule. Integuments develop into the seed coat, not the embryo. Primary endosperm nucleus develops into the endosperm.
Q2Grand Test
A typical angiosperm embryo sac contains three antipodals, two synergids, one egg cell and one central cell with two polar nuclei. What are the total number of cells and nuclei respectively?
Not quite — the answer is C.
The embryo sac contains seven cells: three antipodals, two synergids, one egg cell and one central cell. Although the central cell contains two polar nuclei, it is counted as a single cell. The total nucleus count is eight: one in each antipodal (3), one in each synergid (2), one in the egg cell (1) and two polar nuclei in the central cell (2), giving 3+2+1+2 = 8 nuclei. Therefore the correct combination is 7 cells and 8 nuclei.
Q3Important PYQ Mixed Concepts
In a typical angiosperm, the four microspores produced immediately after meiosis of a microspore mother cell are:
Not quite — the answer is B.
Meiosis reduces the chromosome number to half; therefore one diploid microspore mother cell produces four haploid microspores. These subsequently develop into pollen grains. Option A incorrectly states diploid microspores, reversing the ploidy change of meiosis. Options C and D propose mixed ploidy outcomes that do not occur.
Q4Important PYQ Mixed Concepts
Which structure in a typical angiosperm embryo sac contains the egg cell and two synergids?
Not quite — the answer is A.
The egg apparatus is located at the micropylar end of the embryo sac and consists of one egg cell flanked by two synergids. The central cell contains two polar nuclei. The three antipodal cells occur at the chalazal end. The filiform apparatus is a wall ingrowth within synergids and is not a separate structure housing the egg.
Q5Mixed Revision
In more than half of angiosperm species, pollen grains are most commonly shed from the anther at which developmental stage?
Not quite — the answer is B.
NCERT states that in more than 60 percent of angiosperms, pollen is shed at the two-celled stage, which contains one vegetative cell and one generative cell that has not yet divided. In the remaining species the generative cell divides before shedding, giving the three-celled stage with two male gametes present inside the pollen grain. A one-celled or four-celled stage is not described in NCERT for normal angiosperm pollen.
Q6Mixed Revision
A pollen grain has a vegetative cell and a generative cell when shed from the anther. Which single event converts this two-celled condition into the three-celled male gametophytic stage?
Not quite — the answer is A.
The generative cell undergoes a single mitotic division to produce two male gametes, converting the two-celled pollen grain into the three-celled stage. The vegetative cell does not divide; it elongates to form the pollen tube. No meiosis occurs at any point during pollen germination or male gamete formation. Fusion with the stigma is not an event that transforms the pollen grain structure.
Q7Pre-fertilisation: Structures and Events
A typical angiosperm anther is described as dithecous because it possesses
Not quite — the answer is A.
A dithecous anther has two theca, and each theca contains two microsporangia, making a total of four microsporangia per anther. Option B is wrong because each lobe belongs to one theca, not the reverse. Option D incorrectly omits the theca organization entirely.
Q8Pre-fertilisation: Structures and Events
Fibrous thickenings that aid anther dehiscence develop in which wall layer?
Not quite — the answer is B.
Endothecium develops fibrous bands (thickenings) that help rupture the anther wall for pollen release. Epidermis is the outermost protective layer with no thickening role. Tapetum is the innermost nutritive layer — its function is nourishment, not mechanical dehiscence.
Q9Pollination
Transfer of pollen from anther to stigma of the same flower is termed
Not quite — the answer is A.
Autogamy is self-pollination within the same flower — pollen from the anther lands on the stigma of the same flower. Geitonogamy also involves the same plant but occurs between different flowers. Cleistogamy is a condition (closed flowers), not a pollination type per se.
Q10Pollination
Geitonogamy differs from xenogamy in that geitonogamy involves
Not quite — the answer is B.
Geitonogamy occurs between different flowers on the same plant — it requires a pollinating agent but is genetically equivalent to autogamy. Xenogamy involves pollen transfer between genetically different plants, generating true genetic variation. Option C is wrong because geitonogamy can use any agent — wind, insect, or water.
Q11Post-fertilisation: Structures and Events
The triploid primary endosperm nucleus undergoes repeated divisions to form
Not quite — the answer is A.
Primary endosperm nucleus (3n) divides mitotically to form the nutritive endosperm tissue. Embryo arises from the zygote, not the endosperm nucleus. Seed coat and perisperm have entirely different origins.
Q12Post-fertilisation: Structures and Events
In nuclear type of endosperm development, the primary endosperm nucleus undergoes
Not quite — the answer is B.
Nuclear endosperm is characterised by repeated free nuclear divisions where cytokinesis is delayed; cell walls form only later. Option A describes cellular endosperm. Meiosis never occurs during endosperm formation.
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Get RankUp on Google PlayQ13Double Fertilisation
Double fertilisation in angiosperms involves which two fusion events?
Not quite — the answer is A.
Double fertilisation consists of two distinct fusion events: syngamy (fusion of one male gamete with the egg cell) and triple fusion (fusion of the second male gamete with the two polar nuclei). Pollination is a pre-fertilisation event, not a fusion. Meiosis and mitosis are cell division types — not fertilisation events.
Q14Double Fertilisation
Syngamy in angiosperms results in the formation of
Not quite — the answer is B.
Syngamy is the fusion of one male gamete (n) with the egg cell (n) to produce the diploid zygote (2n) — the precursor of the embryo. Primary endosperm nucleus results from triple fusion, not syngamy. Secondary nucleus is formed by fusion of the two polar nuclei before fertilisation — a separate, pre-fertilisation event.
Q15Apomixis and Polyembryony
Apomixis is defined as
Not quite — the answer is A.
Apomixis is the production of seeds without fertilisation, bypassing normal sexual reproduction entirely. Option B describes parthenocarpy; Options C and D describe events of normal sexual reproduction.
Q16Apomixis and Polyembryony
In diplospory, the embryo develops from
Not quite — the answer is B.
In diplospory, meiosis is suppressed and the diploid egg (unreduced) develops into embryo without fertilisation, preserving parental genotype. This contrasts with normal fertilisation where the haploid egg requires a sperm.
Q17Full Chapter Mixed
Which layer of the microsporangium nourishes developing pollen grains and secretes enzymes for pollen wall formation?
Not quite — the answer is A.
Tapetum is the innermost nutritive layer of the microsporangium wall, supplying nutrients and enzymes to developing microspores. Endothecium is involved in anther dehiscence, not pollen nourishment.
Q18Full Chapter Mixed
In the Polygonum type of embryo sac development, which megaspore of the linear tetrad remains functional?
Not quite — the answer is B.
In the most common (Polygonum type) monosporic development, the chalazal megaspore is functional while the other three degenerate. This chalazal position is a direct NEET fact from NCERT.
Q19Pre-fertilisation: Structures and Events
Which innermost microsporangium wall layer nourishes developing microspore mother cells and pollen grains?
Not quite — the answer is C.
Tapetum is the innermost and most metabolically active wall layer, providing nutrition to developing microspores and pollen grains. Middle layers are ephemeral and crushed early during development. Endothecium plays a mechanical role in dehiscence, not nutrition.
Q20Pre-fertilisation: Structures and Events
Microsporogenesis refers to which of the following events?
Not quite — the answer is D.
Microsporogenesis is the process by which diploid microspore mother cells (MMC) undergo meiosis to form haploid microspores. Option C describes megasporogenesis, a common distractor. Option A describes a later event within male gametophyte maturation.
Q21Pre-fertilisation: Structures and Events
The highly resistant nature of pollen exine is attributed to the presence of
Not quite — the answer is A.
Sporopollenin is one of the most resistant biological polymers known, forming the exine of pollen grains and protecting them from extreme conditions. Callose is a temporary wall around microspore tetrads and is dissolved before maturation. Cellulose forms the intine, not the exine.
Q22Pre-fertilisation: Structures and Events
In most angiosperms, pollen grains are shed from the anther at which stage?
Not quite — the answer is B.
Most angiosperms shed pollen at the two-celled stage (one vegetative + one generative cell). Some species shed at the three-celled stage (after generative cell division into two male gametes). Uninucleate stage is the microspore before first mitotic division.
Q23Pre-fertilisation: Structures and Events
The generative cell of a pollen grain divides mitotically to produce
Not quite — the answer is C.
The generative cell undergoes mitosis to form two male gametes, which participate in double fertilisation. Vegetative nuclei are not products of generative cell division. Options B and D are fabricated combinations with no NCERT basis.
Q24Pre-fertilisation: Structures and Events
In an anatropous ovule, the micropyle lies close to the
Not quite — the answer is D.
In an anatropous ovule, the body is completely inverted so the micropyle comes to lie very close to the hilum (point of funicle attachment). Chalaza is at the opposite end. This inversion is the defining feature of anatropous ovules, the most common type in angiosperms.
ELITE question · AIR under 50 level
This chapter has 212 ELITE questions for students aiming at the very top. They are only in the app.
Unlock ELITE questions in the appKey Structures & Processes
Quick revision: most questions in this chapter test these facts.
| Structure / Process | Key Fact |
|---|---|
| Microsporangium | 4 wall layers — epidermis, endothecium, middle layers, tapetum; tapetum nourishes developing pollen |
| Megasporangium (ovule) | Contains nucellus, embryo sac; 7-celled, 8-nucleate at maturity |
| Double fertilisation | One sperm + egg → zygote (2n); one sperm + 2 polar nuclei → PEN (3n) → endosperm |
| Pollination types | Autogamy (same flower), geitonogamy (same plant), xenogamy (different plant) |
| Embryo sac | Monosporic (Polygonum type); egg apparatus (2 synergids + 1 egg) + 3 antipodals + 2 polar nuclei |
| Post-fertilisation | Ovule → seed; ovary → fruit; integuments → seed coat |
What the app covers in this chapter
388 questions in total, each with a detailed explanation.
| Grand Test | 70 |
| Important PYQ Mixed Concepts | 69 |
| Mixed Revision | 69 |
| Pre-fertilisation: Structures and Events | 40 |
| Pollination | 40 |
| Post-fertilisation: Structures and Events | 40 |
| Double Fertilisation | 20 |
| Apomixis and Polyembryony | 20 |
| Full Chapter Mixed | 20 |
Questions students ask
Is Sexual Reproduction in Flowering Plants important for NEET?
Extremely. It is one of the highest-weightage chapters in NEET Biology. Questions on double fertilisation, embryo sac structure, pollination types and post-fertilisation changes appear almost every year.
Which topics from this chapter should I revise first?
Start with the structure of a microsporangium and embryo sac (7-celled, 8-nucleate), then double fertilisation, pollination types (autogamy vs xenogamy) and post-fertilisation changes (ovule → seed, ovary → fruit).
How many questions from this chapter are on RankUp?
The RankUp app has 388 questions on Sexual Reproduction in Flowering Plants, including 212 ELITE questions written for students aiming at AIR under 50. Every question has a detailed explanation.
