How do Organisms Reproduce? — Class 10 Science MCQs

NCERT | CBSE Curriculum

Practice 100+ MCQs on How do Organisms Reproduce for Class 10.
Binary fission, budding, spores, pollination, fertilisation & human reproductive system.
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Quick Revision: How do Organisms Reproduce?

  • DNA Copying: Essential for reproduction; introduces variations through errors.
  • Asexual Reproduction: One parent, no gamete fusion; e.g., binary fission (Amoeba), budding (Hydra), fragmentation (Spirogyra).
  • Vegetative Propagation: Using plant parts—potato (tuber), ginger (rhizome), Bryophyllum (leaf buds).
  • Spore Formation: Rhizopus forms spores in sporangia; thick-walled for survival.
  • Sexual Reproduction: Two parents, gamete fusion; increases genetic diversity.
  • Flower Parts: Stamen (anther, filament), Pistil (stigma, style, ovary).
  • Pollination: Transfer of pollen to stigma; self or cross-pollination.
  • Fertilization: Fusion of male gamete with egg in ovule; forms zygote.
  • Seed Formation: Ovule → seed, Ovary → fruit.
  • Human Male System: Testes (sperm production), scrotum (temperature regulation), vas deferens, penis.
  • Human Female System: Ovaries (egg production), fallopian tubes (fertilization site), uterus (embryo development).
  • Menstrual Cycle: ~28 days; menstruation occurs if fertilization doesn’t happen.
  • Fertilization & Implantation: Sperm + egg → zygote → embryo implants in uterus.
  • Placenta: Provides nutrients/O₂ to fetus; removes wastes via umbilical cord.
  • Contraception: Barrier (condom), hormonal (pills), IUD (Copper-T), surgical (vasectomy/tubectomy).
  • STDs: Bacterial (syphilis, gonorrhea), Viral (AIDS, herpes); prevention via safe sex.

External Resources: Byjus - Reproduction | Khan Academy - Cell Division

Chapter Summary: How do Organisms Reproduce?

How do Organisms Reproduce MCQ Class 10 explores the fundamental question—how do organisms create new life? We dive into the world of reproduction, from simple asexual methods like binary fission and budding to complex sexual processes in flowering plants and humans. We understand why DNA copying is crucial, how variations arise, and why sexual reproduction offers evolutionary advantages.

We study vegetative propagation, spore formation, and tissue culture in plants, along with pollination, fertilization, and seed/fruit formation. We also explore the human male and female reproductive systems, the menstrual cycle, fertilization and implantation, and the role of the placenta. The chapter also covers contraception methods and sexually transmitted diseases.

This high-weightage chapter demands clarity on diagrams of reproductive systems, comparisons of asexual vs. sexual reproduction, plant reproductive parts, and reproductive health topics. Regular practice builds confidence in handling diagram labeling, comparative tables, and ethical questions about reproductive health.