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NEET BotanyUpdated 19 Oct 2026

Sexual Reproduction in Flowering plants: NEET PYQs and weightage

Sexual Reproduction in Flowering plants carries 6.4 of 100 Botany marks in NEET by past-paper share: 51 of the 793 tagged NEET Botany PYQs in the ViJEEta bank (NEET 2013–2026). It ranks 7 of 21 Botany chapters.

Take the 25-question Sexual Reproduction in Flowering plants testKey facts ↓All NEET Botany chapters
6.4/100 Weight in Botany
4 of 5 Exam importance (4/5, by past-paper share)
51 NEET PYQs
543 Practice questions
318 With measured difficulty

How the weight is computed: this chapter's tagged NEET PYQs divided by all tagged NEET Botany PYQs in the bank (51 of 793), times 100, with repeated questions counted once. The bank does not store the year of each NEET question, so none is printed. Computed from the bank at build time. Updated 19 Oct 2026.

Sexual Reproduction in Flowering plants: key facts for NEET

16 facts the paper keeps asking, each with how it is asked. Copy it onto one page of your notebook: that page is this chapter's handbook.

  1. Anther structure

    A typical angiosperm anther is bilobed, dithecous and tetrasporangiate, with four microsporangia at the corners, two per lobe.

    Asked as: How many microsporangia are in a typical anther / how many theca in each lobe?

  2. Microsporangium wall

    Microsporangium wall has four layers: epidermis, endothecium, middle layers and tapetum. Tapetum is innermost, nourishes pollen, and its cells often have more than one nucleus.

    Asked as: Which wall layer nourishes developing pollen, and which layers help in dehiscence?

  3. Exine and intine

    Exine is made of sporopollenin, one of the most resistant organic materials known; no enzyme that degrades it is known so far. Germ pores lack it. Intine is cellulose + pectin.

    Asked as: Why are pollen grains well preserved as fossils? / Where is sporopollenin absent?

  4. Stage of pollen shedding

    In over of angiosperms pollen is shed at the 2-celled stage (vegetative + generative cell); the rest shed at the 3-celled stage.

    Asked as: At what stage is pollen shed in most angiosperms?

  5. Pollen viability and storage

    Rice and wheat pollen lose viability within 30 minutes; some Rosaceae, Leguminoseae and Solanaceae stay viable for months. Pollen banks store pollen in liquid nitrogen at .

    Asked as: Match the plant with its pollen viability / storage temperature of pollen banks.

  6. Hilum, micropyle and chalaza

    Hilum is the junction of ovule and funicle. The micropyle is the opening in the integuments, and the chalaza is the basal end opposite it.

    Asked as: Which region joins the ovule body to the funicle?

  7. Monosporic development

    In most flowering plants one megaspore is functional and three degenerate; embryo sac from a single megaspore = monosporic development.

    Asked as: How many megaspores degenerate / what is monosporic development?

  8. Mature embryo sac

    Mature embryo sac is 8-nucleate but 7-celled: egg apparatus (2 synergids + 1 egg) at micropylar end, 3 antipodals at chalazal end, central cell with 2 polar nuclei.

    Asked as: Number of cells vs nuclei in an embryo sac; which cells lie at the chalazal end?

  9. Filiform apparatus

    The filiform apparatus on synergids guides the pollen tube, which enters the ovule through the micropyle and then enters a synergid.

    Asked as: Which structure guides the pollen tube into the synergid?

  10. Chasmogamous and cleistogamous flowers

    Viola, Oxalis and Commelina bear chasmogamous and cleistogamous flowers. Cleistogamous flowers never open, are invariably autogamous, and set seed even without pollinators.

    Asked as: Can cross-pollination occur in cleistogamous flowers? Name a plant with both flower types.

  11. Geitonogamy and xenogamy

    Geitonogamy is functionally cross-pollination but genetically like autogamy. Xenogamy is the only type bringing genetically different pollen.

    Asked as: Pollination to another flower of the same plant is called? Which type gives genetic variation?

  12. Water pollination

    Water pollination is rare, about 30 genera, mostly monocots (Vallisneria, Hydrilla, marine Zostera). Water hyacinth and water lily are pollinated by insects or wind.

    Asked as: Pick the water-pollinated plant / why water hyacinth is not hydrophilous.

  13. Monoecy and dioecy

    Monoecy (castor, maize) prevents autogamy but not geitonogamy. Dioecy (papaya) prevents both.

    Asked as: Which condition prevents both autogamy and geitonogamy?

  14. Double fertilisation

    Double fertilisation is syngamy (male gamete + egg diploid zygote, ) plus triple fusion (male gamete + 2 polar nuclei triploid PEN, ). It is unique to flowering plants.

    Asked as: Ploidy of zygote and PEN / name the nuclei in triple fusion.

  15. Endosperm development

    Endosperm development precedes embryo development. Coconut water is free-nuclear endosperm, and the white kernel is cellular endosperm.

    Asked as: Tender coconut water represents which type of endosperm?

  16. Albuminous seeds and perisperm

    Non-albuminous seeds have no endosperm left (pea, groundnut). Albuminous seeds retain some (wheat, maize, barley, castor). Persistent nucellus is perisperm (black pepper, beet).

    Asked as: Identify the albuminous seed / seeds with perisperm.

Trap

Perisperm is leftover nucellus inside the seed (black pepper, beet). Pericarp is the fruit wall formed from the ovary wall. Same "peri-", totally different origin.

How does NEET ask Sexual Reproduction in Flowering plants?

8 real previous-year questions from this chapter, as printed in the paper, each with its worked solution. Answer the first one here with no sign-in.

Q1BotanyNEET UG PYQPollination
Try right here · No sign-in
Given below are two statements: Statement I : Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination In the light of the above statements, choose the correct answer from the options given below:
Answer key (A) & worked solution

Correct answer: Option A

Cleistogamous flowers are the ones that do not open and show self-pollination. Hence, there is no cross pollination occurring at all in these plants, there is little to no variation, which is disadvantageous for the plants.
Q2BotanyNEET UG PYQPollination
Identify the incorrect statement related to Pollination:
APollination by water is quite rare in flowering plants
BPollination by wind is more common amongst abiotic pollination
CFlowers produce foul odours to attract flies and beetles to get pollinated
DMoths and butterflies are the most dominant pollinating agents among insects
Answer key (D) & worked solution

Correct answer: Option D

Among the animals, insects particularly bees are the dominant pollinating agents. Pollination carried out through water is called hydrophily. Pollination by water is quite rare in flowering plants (only 2%). Pollination by wind is more common amongst abiotic pollination. Wind pollination requires the light and non-sticky pollen grains so that they can be transported in wind currents. Some plants whose flowers are pollinated by flies and beetles smell this way(foul odour), mainly to attract flies and beetles, which normally lay their eggs in faeces and rotting materials.
Q3BotanyNEET UG PYQDouble Fertilization
Function of filiform apparatus is to
AStimulate division of generative cell
BProduce nectar
CGuide entry of pollen tube
DRecognise the suitable pollen at stigma
Answer key (C) & worked solution

Correct answer: Option C

The filiform apparatus plays an important role in guiding the pollen tube into the synergid. Synergid cell wall forms a filiform apparatus at the micropylar end. Filiform apparatus is the extension of the synergids beyond the apex of embryo sac. It helps in the entry of pollen tubes in the synergids.
Q4BotanyNEET UG PYQPre-Fertilisation: Structure and Events
The plant parts which consist of two generations one within the other: (i) Pollen grains inside the anther (ii) Germinated pollen grain with two male gametes (iii) Seed inside the fruit (iv) Embryo sac inside the ovule
A(iii) and (iv)
B(i) and (iv)
C(i) only
D(ii) only
Answer key (B) & worked solution

Correct answer: Option B

(a) Pollen grain (n) located inside the anther (2n) which develops into male gametophyte. (b) Embryo Sac (n) is a female gametophyte located inside ovule (2n).
Q5BotanyNEET UG PYQPre-Fertilisation: Structure and Events
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
A-196C
B-80C
C-120C
D-160C
Answer key (A) & worked solution

Correct answer: Option A

Pollen grains can be stored for several years in liquid nitrogen at -196C. This technique is known as Cryopreservation. Pollen seed banks are made in this way which is very important for plant breeding.
Q6BotanyNEET UG PYQSpecial Modes of Reproduction
Seed formation without fertilization in flowering plants involves the process of
ASporulation
BBudding
CSomatic hybridization
DApomixis
Answer key (D) & worked solution

Correct answer: Option D

Apomixis is a special mechanism in certain plants to produce seeds without fertilization. Apomixis is a form of asexual reproduction that mimics sexual reproduction. For example, Asteraceae and grasses.
Q7BotanyNEET UG PYQPre-Fertilisation: Structure and Events
Which of the following statements is NOT true?
ATapetum helps in the dehiscence of anther
BExine of pollen grain is made up of sporopollenin
CPollen grains of many species cause severe allergies
DStored pollen in liquid nitrogen can be used in the crop breeding programmes
Answer key (A) & worked solution

Correct answer: Option A

Tapetum is the innermost layer and completely surrounds the sporogenous tissue. The cells of Tapetum have dense cytoplasm and generally possess more than one nuclei. Tapetum nourishes the developing pollen grains. The layer of the anther wall that helps in anther dehiscence is endothecium. The cells of endothecium develop fibrous thickenings at maturity which radiate from the inner tangential walls. These thickenings are made up of alpha cellulose and traces of lignin. These thickenings are hygroscopic and thus, help in anther dehiscence.
Q8BotanyNEET UG PYQPollination
Large, colourful, fragrant flowers with nectar are seen in
ABird pollinated plants
BBat pollinated plants
CWind pollinated plants
DInsect pollinated plants
Answer key (D) & worked solution

Correct answer: Option D

Majority of insect-pollinated flowers are large, colourful, fragrant and rich in nectar. Animals are attracted to flowers by colour and/or fragrance.

Which topics in Sexual Reproduction in Flowering plants carry the most questions?

All 10 topics, by tagged PYQs, then practice questions. Counted from the bank. Updated 19 Oct 2026.

TopicPYQsPractice questions
Pre-Fertilisation: Structure and Events19202
Pollination17125
Double Fertilization654
Post-Fertilization Events - Seed and Fruit438
Post-Fertilization Events - Endosperm and Embryo341
Special Modes of Reproduction127
Pollen-Pistil Interaction122
Artificial Hybridization016
Miscellaneous Examples011
Flower - A Fascinating Organ of Angiosperms07

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Chapters either side of Sexual Reproduction in Flowering plants by weight

Biological Classification Weight 7.1/100Cell Cycle and Cell Division Weight 6.4/100Biodiversity and Its Conservation Weight 5.3/100Ecosystem Weight 4.7/100