6. REPRODUCTION IN ANIMALS
Reproduction is vital for the survival and continuation of species. This chapter explores the different modes of reproduction in animals, focusing on sexual and asexual reproduction, including the processes of fertilization and the development of embryos. It emphasizes the significance of reproductive organs, zygotes, and the differences between viviparous and oviparous animals.
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What we have learnt
- There are two modes by which animals reproduce: Sexual reproduction and Asexual reproduction.
- Reproductive organs include ovaries and testes, producing female and male gametes respectively.
- Fertilization can occur internally or externally, leading to the formation of a zygote that develops into an embryo.
Key Concepts
- -- Sexual Reproduction
- Reproduction involving the fusion of male and female gametes.
- -- Asexual Reproduction
- Reproduction that does not involve the fusion of gametes, typically involving a single parent.
- -- Fertilization
- The process where male and female gametes fuse to form a zygote.
- -- Embryo
- The developing stage following fertilization where initial cell divisions occur.
- -- Metamorphosis
- The process of transformation from larva to adult form, seen in animals like frogs.
- -- Viviparous Animals
- Animals that give birth to live young ones instead of laying eggs.
- -- Oviparous Animals
- Animals that lay eggs, with development taking place outside the female body.
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