Sexual Reproduction in Flowering Plants NEET PYQs (2005–2026) with Solutions

10 solved Sexual Reproduction in Flowering Plants PYQs

Real NEET and AIPMT questions from this chapter, newest first. Try each one, then open the answer and the step-by-step explanation.

1. Question 1 (NEET 2026)

   NEET 2026MediumMale and Female Gametophytes

   Arrange the following in the correct developmental sequence related to microsporogenesis: A. Microspore tetrads B. Sporogenous tissue C. Pollen grains D. Pollen mother cells Choose the correct answer from the options given below :

   1. AOption A: D, A, C, B
   2. BOption B: B, D, A, C
   3. COption C: B, D, C, A
   4. DOption D: A, D, C, B

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   Correct answer: (B) B, D, A, C

   Explanation

   Development during microsporogenesis proceeds as: Sporogenous tissue → Pollen mother cells → Microspore tetrads → Pollen grains.

2. Question 2 (NEET 2026)

   NEET 2026MediumDouble Fertilisation

   Which one of the following is a triploid cell?

   1. AOption A: Synergid
   2. BOption B: Central cell
   3. COption C: Zygote
   4. DOption D: Primary endosperm cell

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   Correct answer: (D) Primary endosperm cell

   Explanation

   The primary endosperm cell is triploid (3n), formed after fusion of one male gamete with two polar nuclei during triple fusion.

3. Question 3 (NEET 2026)

   NEET 2026EasyPollination

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

   1. AOption A: Autogamy
   2. BOption B: Xenogamy
   3. COption C: Geitonogamy
   4. DOption D: Cleistogamy

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   Correct answer: (B) Xenogamy

   Explanation

   Xenogamy involves transfer of pollen between different plants of the same species and introduces genetically different pollen grains.

4. Question 4 (NEET 2026)

   NEET 2026EasyStructure of anther (stamen)

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

   1. AOption A: $2$
   2. BOption B: $6$
   3. COption C: $8$
   4. DOption D: $12$

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   Correct answer: (A) $2$

   Explanation

   A typical angiosperm anther is bilobed, with each lobe having two theca, i.e., the anther is dithecous. So the anther has 2 lobes × 2 theca = 4 microsporangia in all (tetragonal), but each lobe has 2 theca. Hence the answer is 2, option (A).

5. Question 5 (NEET 2026)

   NEET 2026EasyEmbryo sac and pollen tube guidance

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

   1. AOption A: Antipodals
   2. BOption B: Synergids
   3. COption C: Central cells
   4. DOption D: Polar nucleus

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   Correct answer: (B) Synergids

   Explanation

   The egg apparatus at the micropylar end of the embryo sac has two synergids and one egg cell. The synergids have special cellular thickenings at the micropylar tip called the filiform apparatus. The filiform apparatus plays an important role in guiding the pollen tube into the synergid, where the male gametes are released. Antipodals lie at the chalazal end, and the central cell with its two polar nuclei later forms the primary endosperm cell. Hence option (B).

6. Question 6 (NEET 2026)

   NEET 2026EasyAlbuminous and non-albuminous seeds

   Which of the following plant produces non-albuminous seeds?

   1. AOption A: Wheat
   2. BOption B: Maize
   3. COption C: Barley
   4. DOption D: Pea

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   Correct answer: (D) Pea

   Explanation

   Non-albuminous seeds have no residual endosperm because it is completely consumed during embryo development, e.g., pea and groundnut. Albuminous seeds retain a part of the endosperm because it is not completely used up during embryo development, e.g., wheat, maize, barley, castor. Hence pea produces non-albuminous seeds, option (D).

7. Question 7 (NEET 2026)

   NEET 2026EasyDouble fertilisation and endosperm ploidy

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

   1. AOption A: $18$
   2. BOption B: $36$
   3. COption C: $54$
   4. DOption D: $72$

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   Correct answer: (C) $54$

   Explanation

   In double fertilisation, one male gamete fuses with the two polar nuclei of the central cell (triple fusion) to form the triploid primary endosperm nucleus (PEN). So the endosperm is $3n$. Given $2n = 36$, the haploid number is $n = 18$. Endosperm $= 3n = 3 \times 18 = 54$. Hence option (C).

8. Question 8 (NEET 2025)

   NEET 2025MediumFlower Structure

   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 :

   1. AOption A: Both A and R are true and R is the correct explanation of A
   2. BOption B: Both A and R are true but R is NOT the correct explanation of A
   3. COption C: A is true but R is false
   4. DOption D: A is false but R is true

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   Correct answer: (B) Both A and R are true but R is NOT the correct explanation of A

   Explanation

   Wind and water pollinated flowers are generally not colourful and do not produce nectar because they do not require animal attraction. They also produce enormous amounts of pollen grains to ensure successful pollination. However, the large production of pollen is not the direct reason for lack of colour and nectar.

9. Question 9 (NEET 2025)

   NEET 2025MediumFlower Structure

   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 :

   1. AOption A: Both A and R are true and R is the correct explanation of A
   2. BOption B: Both A and R are true but R is NOT the correct explanation of A
   3. COption C: A is true but R is false
   4. DOption D: A is false but R is true

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   Correct answer: (C) A is true but R is false

   Explanation

   A typical mature embryo sac of angiosperms is 8-nucleate and 7-celled. The egg apparatus consists of one egg cell and two synergids, while the two polar nuclei are present in the central cell. Hence Assertion is true but Reason is false.

10. Question 10 (NEET 2024)

    NEET 2024MediumPost-Fertilisation Events

    Identify the part of the seed from the given figure which is destined to form root when the seed germinates.

    1. AOption A: C
    2. BOption B: D
    3. COption C: A
    4. DOption D: B

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    Correct answer: (A) C

    Explanation

    The radicle develops into the root during seed germination. In the given figure, label D represents the radicle.