NSEB Reproduction in Plants Question, PDF Download

NSEB Reproduction in Plants questions focus on testing your understanding of how plants reproduce, especially in angiosperms. This topic includes important concepts like pollination, fertilization, embryo sac structure, and seed development. The questions are mostly application-based, so it is important to have clear concepts rather than just memorising facts. Practising these questions helps you improve accuracy, strengthen your fundamentals, and prepare effectively for the NSEB exam.

NSEB Reproduction in Plants Questions

Below are practice questions modeled after the NSEB difficulty level. These focus on conceptual clarity and factual accuracy.

1. Reproduction is necessary to maintain:
   (A) Continuity of life
   (B) Maintenance of species or race
   (C) to increase the population
   (D) None of these are correct
   Answer: (B)

2. Vegetative propagation helps a plant grower in:
   (A) Growing a plant similar to the parent plant genetically
   (B) Quick propagation of plants
   (C) Combination of desirable traits of two plants
   (D) Both (B) and (C)
   Answer: (D)

3. Ovary in a tomato flower had numerous ovules but fruit has approximately 40 seeds at maturity, the remaining ovules were:
   (A) Used in making fruit wall
   (B) Converted into juicy liquid
   (C) Destroyed
   (D) Ejected out of ovary
   Answer: (C)

4. The odd one is:
   (A) Micropyle
   (B) Embryo sac
   (C) Nucellus
   (D) Pollen grain
   Answer: (D)

5. Where do pollination and fertilization takes place:
   (A) Stigma & Style
   (B) Style & stigma
   (C) Stigma & ovule
   (D) Stigma & pollentube
   Answer: (C)

6. A phenomenon is termed as parthenogenesis when:
   (A) Artificial fertilization occurs
   (B) Egg is fertilized by a sperm
   (C) Egg undergoes cleavage without fertilization
   (D) Sperm dies before fertilization
   Answer: (C)

7. Microscopic structure in a flower that contains the polar nuclei is:
   (A) Pollen tube
   (B) Pollen sac
   (C) Embryo sacs
   (D) Male-gametophyte
   Answer: (C)

8. Seminiferous tubules are composed of:
   (A) Spermatogonia
   (B) Glandular epithelium
   (C) Sensory epithelium
   (D) Germinal epithelium
   Answer: (D)

9. Mitochondria of a sperm occur in its:
   (A) Middle piece
   (B) Head
   (C) Acrosome
   (D) Tail
   Answer: (A)

10. Relative sizes of egg cell, morula blastula & gastrula are:
    (A) Egg cell is smallest & gastrula cell is largest
    (B) Egg cell is the largest and gastrula cell is smallest
    (C) Egg cell is largest & morula cell is the smallest
    (D) All are of equal size
    Answer: (B)

11. Syngamy is the process in which:-
    (A) Male gamete fuses with female gamete
    (B) Pollen tube enters into the ovule through chalaza
    (C) Pollen tube enter into the ovule through micropyle
    (D) Generative cell and tube cell fuse
    Answer: (A)

12. If root of a flowering plant has 24 chromosomes, then its gamete has how many chromosomes:-
    (A) 24
    (B) 12
    (C) 4
    (D) 8
    Answer: (B)

13. Two non motile male gamete in angiosperm is produced by:-
    (A) generative cell
    (B) microspore mother cell
    (C) vegetative cell
    (D) tube cell
    Answer: (B)

14. Arising from placenta is megasporangium which is commonly known as:
    (A) Ovule
    (B) Ovary
    (C) Ovarian cavity
    (D) Stamen
    Answer: (A)

15. In case of fungi, which type of asexual reproduction takes place
    (A) Fission
    (B) Budding
    (C) Spore formation
    (D) None of these are correct
    Answer: (A)

16. Double fertilization is
    (A) fusion of two male gametes with egg
    (B) fusion of one male gamete with egg and the other male gamete with the polar nuclei
    (C) both are correct
    (D) both are incorrect
    Answer: (C)

17. The structure meant for the nourishment of developing embryo in case of plants is -
    (A) pollen tube
    (B) endosperm
    (C) both A & B are correct
    (D) none of these
    Answer: (B)

18. The embryo is formed by the fusion of-
    (A) male gametes
    (B) male & female gametes
    (C) female gametes
    (D) spores & gametes
    Answer: (B)

19. The genetic information is stored in -
    (A) DNA
    (B) RNA
    (C) Ribosome
    (D) ER
    Answer: (A)

20. Each female flower consists of
    (A) ovary
    (B) stigma
    (C) ovary, style and stigma
    (D) thalamus
    Answer: (C)

NSEB Reproduction in Plants Question PDF Download

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NSEB Sexual Reproduction in Plants Important Concepts

To solve complex NSEB sexual reproduction in plants questions, students should focus on these detailed sub-topics:

The Embryo Sac Structure

A mature Angiosperm embryo sac is generally 7-celled and 8-nucleated. It consists of:

• Antipodal Cells (3): Located at the chalazal end.

• Central Cell (1): Contains two polar nuclei.

• Egg Apparatus (3): One egg cell and two synergids at the micropylar end. Synergids contain the filiform apparatus, which guides the pollen tube.

Pollen-Pistil Interaction

This is a dynamic process involving chemical recognition between the pollen and the stigma. Only compatible pollen is allowed to germinate and grow a pollen tube through the style to reach the ovary.

Apomixis and Polyembryony

• Apomixis: Production of seeds without fertilization. These are essentially clones of the mother plant.

• Polyembryony: The occurrence of more than one embryo in a seed, frequently seen in Citrus species.