Chapter 2: Sexual Reproduction in Plants

NCERT Solutions for CBSE Class 10 Biology — 26 solved questions with detailed explanations.

Questions

Topics

Solved Questions

Q1. The male gametophyte in angiosperms is the:

Anther
Pollen grain
Ovule
Embryo sac

Difficulty: Easy · Topic: Male Gametophyte

Solution

Pollen grain is the male gametophyte (partially developed). It contains vegetative cell and generative cell.

Q2. Megasporogenesis produces:

pollen
seeds
fruits
embryo sac

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

embryo sac.

Q3. Endosperm is:

haploid (n)
diploid (2n)
tetraploid (4n)
triploid (3n)

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

triploid (3n).

Q4. Polyembryony is:

single embryo
multiple embryos in one seed
no embryo
multiple seeds

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

multiple embryos in one seed.

Q5. Pollination is transfer of pollen from:

stigma to ovary
root to shoot
ovary to anther
anther to stigma

Difficulty: Easy · Topic: Reproduction

Solution

anther to stigma.

Q6. Entomophily is pollination by:

birds
water
insects
wind

Difficulty: Easy · Topic: Reproduction

Solution

insects.

Q7. Anemophily is pollination by:

wind
birds
insects
water

Difficulty: Easy · Topic: Reproduction

Solution

wind.

Q8. Hydrophily is pollination by:

birds
water
wind
insects

Difficulty: Easy · Topic: Reproduction

Solution

water.

Q9. After fertilization, ovule develops into:

seed
flower
leaf
fruit

Difficulty: Easy · Topic: Reproduction

Solution

seed.

Q10. After fertilization, ovary develops into:

flower
fruit
seed
leaf

Difficulty: Easy · Topic: Reproduction

Solution

fruit.

Q11. Tapetum provides:

transport
nutrition to developing pollen
support
protection

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

nutrition to developing pollen.

Q12. Sporopollenin is:

protein
most resistant organic material (on exine)
lipid
carbohydrate

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

most resistant organic material (on exine).

Q13. Pollen tube enters ovule through:

chalaza
funicle
micropyle (porogamy)
integuments randomly

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

micropyle (porogamy).

Q14. Chalazogamy is entry through:

micropyle
chalaza
funicle
integuments

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

chalaza.

Q15. Endosperm development is:

no development
nuclear → cellular type commonly
always free nuclear
always cellular

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

nuclear → cellular type commonly.

Q16. Adventive embryony is embryo from:

cells other than zygote (nucellar, integument)
zygote only
endosperm
pollen

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

cells other than zygote (nucellar, integument).

Q17. Polyembryony is seen in:

maize
rice
wheat
Citrus, mango

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

Citrus, mango.

Q18. True fruit develops from:

whole flower
ovary
thalamus
calyx

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

ovary.

Q19. False fruit develops from:

petals
calyx
parts other than ovary (e.g., thalamus in apple)
ovary only

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

parts other than ovary (e.g., thalamus in apple).

Q20. Seedless fruits can be produced by:

nothing
parthenocarpy (gibberellin treatment)
auxin removal
ethylene removal

Difficulty: Easy · Topic: Sexual Reproduction in Plants

Solution

parthenocarpy (gibberellin treatment).

Q21. The embryo sac in angiosperms is typically:

4-celled
7-celled, 8-nucleate
8-celled
6-celled

Difficulty: Easy-Medium · Topic: Embryo Sac

Solution

Typical embryo sac (Polygonum type): 7 cells and 8 nuclei (3 antipodals, 2 synergids, 1 egg cell, 1 central cell with 2 polar nuclei).

Q22. Triple fusion results in the formation of:

Zygote
Endosperm
Embryo
Seed coat

Difficulty: Easy-Medium · Topic: Double Fertilization

Solution

Triple fusion: 1 sperm + 2 polar nuclei → PEN (Primary Endosperm Nucleus, 3n). Develops into endosperm.

Q23. Microsporogenesis produces:

pollen grains (microspores)
embryo sac
ovules
seeds

Difficulty: Easy-Medium · Topic: Sexual Reproduction in Plants

Solution

pollen grains (microspores).

Q24. Self-incompatibility prevents:

seed formation
vegetative growth
self-pollination/fertilization
cross-pollination

Difficulty: Easy-Medium · Topic: Sexual Reproduction in Plants

Solution

self-pollination/fertilization.

Q25. Parthenocarpy is:

seed development without fruit
none
fruit development without fertilization
pollination without flower

Difficulty: Easy-Medium · Topic: Sexual Reproduction in Plants

Solution

fruit development without fertilization.

Q26. Apomixis is:

budding
fruit formation without seeds
seed formation without fertilization
vegetative reproduction

Difficulty: Easy-Medium · Topic: Sexual Reproduction in Plants

Solution

seed formation without fertilization.

Other Chapters in Biology

Ch 1: Reproduction in Organisms Ch 3: Human Reproduction Ch 4: Reproductive Health Ch 5: Principles of Inheritance Ch 6: Molecular Basis of Inheritance Ch 7: Evolution Ch 8: Human Health & Disease Ch 9: Strategies for Enhancement Ch 10: Microbes in Human Welfare Ch 11: Biotechnology Principles Ch 12: Biotechnology Applications Ch 13: Organisms & Populations Ch 14: Ecosystem Ch 15: Biodiversity & Conservation Ch 16: Environmental Issues

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