NEET Sexual Reproduction in Flowering Plants PYQs & Practice Questions

10 free NEET Biology questions on Sexual Reproduction in Flowering Plants, starting with previous year questions (2016–2026). Tap “Show answer” to check each one. No login needed.

Topics: Male and Female Gametophyte Analogy · Arrangement of Floral Whorls · Why a Dicot Plant May Never Bear Fruit · Conditions for Autogamy in a Chasmogamous Flower · Cleistogamous and Chasmogamous Flowers · Floral Adaptations for Wind Pollination · Preventing Both Autogamy and Geitonogamy · Forming Embryos Without Fertilisation · Fruit Development Without Fertilisation · Water Pollination (Hydrophily) - Correct Statements · Pollination Mechanisms · Pollination - Abiotic Agents

1. Q1NEET 2026Structure of Anther

   How many theca are present in each lobe of a typical bilobed angiosperm anther?

   • A. 6
   • B. 8
   • C. 12
   • D. 2
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   Answer: C — 12

   A typical angiosperm anther is bilobed (dithecous), and each lobe contains two theca (pollen sacs/microsporangia), giving a total of four microsporangia in the whole anther.

2. Q2NEET 2026Albuminous vs Non-albuminous Seeds

   Which of the following plant produces non-albuminous seeds?

   • A. Maize
   • B. Barley
   • C. Pea
   • D. Wheat
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   Answer: B — Barley

   Non-albuminous (exalbuminous) seeds are those where the endosperm is completely consumed during seed development and food is stored in the cotyledons instead. Pea is a classic example of a non-albuminous seed. Maize, barley, and wheat are all albuminous seeds (retain endosperm at maturity).

3. Q3NEET 2026Ploidy of Endosperm (Triple Fusion)

   If the diploid chromosome number of a typical angiosperm is 36, what would be the chromosome number in its endosperm?

   • A. 36
   • B. 54
   • C. 72
   • D. 18
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   Answer: A — 36

   If the diploid (2n) chromosome number is 36, then the haploid (n) number is 18. The endosperm in angiosperms is formed by triple fusion (one male gamete + two polar nuclei), making it triploid (3n) = 3 × 18 = 54.

4. Q4NEET 2026Structure of Female Gametophyte (Embryo Sac)

   Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs?

   • A. Synergids
   • B. Central cells
   • C. Polar nucleus
   • D. Antipodals
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   Answer: —

   Synergid cells, located at the micropylar end of the embryo sac alongside the egg cell, possess a specialized filiform apparatus that helps guide and attract the pollen tube towards the egg for fertilization.

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5. Q5NEET 2026Sequence of events in microsporogenesis

   Arrange the following in the correct developmental sequence related to microsporogenesis: A. Microspore tetrads, B. Sporogenous tissue, C. Pollen grains, D. Pollen mother cells.

   • A. A, D, C, B
   • B. A, B, D, C
   • C. D, A, C, B
   • D. B, D, A, C
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   Answer: C — D, A, C, B

   Sequence: sporogenous tissue (B) → pollen mother cells (D) → microspore tetrads (A) → pollen grains (C): B, D, A, C.

6. Q6NEET 2026Identifying a triploid cell

   Which one of the following is a triploid cell?

   • A. Synergid
   • B. Primary endosperm cell
   • C. Central cell
   • D. Zygote
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   Answer: A — Synergid

   The primary endosperm cell (formed by triple fusion of 2 polar nuclei + 1 male gamete) is triploid (3n).

7. Q7NEET 2026Pollination type bringing genetically different pollen

   Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?

   • A. Geitonogamy
   • B. Xenogamy
   • C. Cleistogamy
   • D. Autogamy
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   Answer: A — Geitonogamy

   Xenogamy is cross-pollination between genetically different plants, bringing genetically different pollen to the stigma.

8. Q8NEET 2026Ovules not enclosed by ovary wall

   In which one of the following is the ovule not enclosed by an ovary wall and remain exposed, both before and after fertilization?

   • A. Pinus
   • B. Wolffia
   • C. Funaria
   • D. Selaginella
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   Answer: —

   Pinus (a gymnosperm) has naked ovules not enclosed within an ovary wall, unlike angiosperms.

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9. Q9NEET 2025Pollination - Abiotic Agents

   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 :

   • A. Both A and R are true and R is the correct explanation of A
   • B. Both A and R are true but R is NOT the correct explanation of A
   • C. A is true but R is false
   • D. A is false but R is true
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   Answer: A — Both A and R are true and R is the correct explanation of A

   Both statements are true: abiotically pollinated flowers (wind/water) lack colour and nectar since these are attractants for biotic pollinators which aren't needed; and they produce enormous pollen since pollination is non-directional/random. However R does not directly explain why they lack colour/nectar (A) — the large pollen production is a separate adaptation for non-directional pollen dispersal, not the explanation for the lack of colour/nectar.

10. Q10NEET 2025Floral Formula Symbols

    Given below are two statements: Statement I: In a floral formula ⊕ stands for zygomorphic nature of the flower, and G stands for inferior ovary. Statement II: In a floral formula ⊕ stands for actinomorphic nature of the flower and G stands for superior ovary. In the light of the above statements, choose the correct answer from the options given below :

    • A. Both Statement I and Statement II are correct
    • B. Both Statement I and Statement II are incorrect
    • C. Statement I is correct but Statement II is incorrect
    • D. Statement I is incorrect but Statement II is correct
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    Answer: C — Statement I is correct but Statement II is incorrect

    ⊕ symbol stands for actinomorphic (radial symmetry) nature of the flower (not zygomorphic, which uses %), and an underlined G (G̲) stands for superior ovary (not inferior — overline Ḡ indicates inferior ovary). So Statement I is incorrect, Statement II is correct.