Chapter Review:
- The production of a new individual from parents body is known as reproduction.
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The fusion of male and female gametes is called sexual reproduction.
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The production of new individual by the involving of only single parent is called asexual reproduction.
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Reproduction resulting from the fusion of male and female gametes is called sexual reproduction.
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Sperms are male gametes which are produced by testis.
- Ovum is female gamete which is produced by female organ ovary.
- The reproductive organs in male include testes, sperm ducts and penis.
- The reproductive organs in the female include ovaries, oviducts and uterus.
- Fusion of male gametes sperms and female gametes ovum is called fertilization.
- Fertilised egg is known as zygote.
- The stage of the embryo in which all the body parts can be identified is called a foetus.
- Fertilization which takes place inside the female body is called internal fertilization.It occurs in many animals including humans, cows, dogs and hens.
- Fertilization in which the fusion of a male and a female gamete takes place outside the body of the female is called external fertilization.It occurs in aquatic animals such as fish, starfish, etc.
- The animals which give birth to young ones are called viviparous animals.
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Those animals which lay eggs are called oviparous animals.
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Reproduction in which an animal reproduces by dividing into two individuals is called binary fission.It occurs in amoeba.
- New individuals develop from the buds in hydra, this type of asexual reproduction is called budding.
- The transformation of the larva into an adult through drastic changes is called metamorphosis.