REPRODUCTION IN ANIMALS

Biology

REPRODUCTION IN ANIMALS

What is reproduction in animals?

  • Sexual reproduction involves the fusion of gametes.
  • In animals two individuals are involved, a male and a female.
  • Special organs known as gonads produce gametes.
  • In males testes produce sperms while in females ovaries produce ova.
  • The fusion of male gamete and female gamete to form a zygote is called fertilization.
See also  ENZYMES

There are two types of fertilization.

External and internal Fertilization.

External fertillzation

  • Example in amphibians takes place in water.
  • The male mounts the female and shed sperms on the eggs as they are laid.
  • Eggs are covered by slippery jelly-like substance which provides protection.
  • Many eggs are released to increase the chances of survival.
See also  GESTATION PERIOD

Internal fertilization

  • This occurs in reptiles, birds and mammals.
  • Fertilization occurs within the body of the female.
  • Fewer eggs are produced because there are higher chances of fertilization since sperms are released into the female body.

See also:

METHODS OF FRUIT AND SEED DISPERSAL

POLLINATION

SEXUAL REPRODUCTION IN PLANTS

ASEXUAL REPRODUCTION

See also  SUPPORT AND MOVEMENT IN PLANTS

REPRODUCTION IN PLANTS AND ANIMALS

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