Reproduction in Animals

Science Class 8 : Chapter 09

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Quick Revision : Reproduction in Animals

  • Modes of Reproduction: Sexual reproduction (two parents) and asexual reproduction (single parent).
  • Sexual Reproduction: Involves fusion of male and female gametes (sperm and egg) to form a zygote.
  • Male Reproductive Organs: Testes produce sperms, sperm ducts, and penis.
  • Female Reproductive Organs: Ovaries produce eggs, oviducts (fallopian tubes), and uterus.
  • Fertilization: Fusion of sperm and egg. Can be internal (inside female body) or external (outside female body).
  • Zygote to Embryo: Zygote divides repeatedly to form an embryo, which develops into a foetus.
  • Viviparous vs Oviparous: Viviparous animals give birth to young ones (humans, dogs). Oviparous animals lay eggs (birds, reptiles).
  • Metamorphosis: Transformation of larva into adult through drastic changes (frog, butterfly).
  • Asexual Reproduction: Budding (Hydra), binary fission (Amoeba), cloning (Dolly the sheep).

Questions

Chapter Summary : Reproduction in Animals

What You Will Learn: This chapter covers different modes of animal reproduction, human reproductive systems, fertilization process, embryonic development, viviparous vs oviparous animals, metamorphosis, and asexual reproduction methods.

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