Reproduction of animals Why do animals reproduce Animals

Animals die… • All animals die when they get old. • Some animals die

If animals do not reproduce, • they will become… Extinct

Animal Reproduction The egg of the female animal is fertilised by the sperm of

Animals reproduce in two ways: 1. By laying eggs The mothers lay the fertilised

Which comes first? Eggs or chicks? What is inside a chicken’s egg? • Shell

2. By giving birth to the young • The fertilised egg develops in the

Which animal below lay eggs? Which animal gives birth to its young?

The Chinese University of Hong Kong Postgraduate Diploma of Education (Primary) DEP 5114 A

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Reproduction of animals

？？？ Why do animals reproduce? ？？？

Animals die… • All animals die when they get old. • Some animals die in natural disasters. • Some are killed by other animals. • Some die when there is no food or water.

If animals do not reproduce, • they will become… Extinct

How do animals reproduce?

Animal Reproduction The egg of the female animal is fertilised by the sperm of the male animal.

Animals reproduce in two ways: 1. By laying eggs The mothers lay the fertilised eggs and hatch them. They lay a large number of eggs each time.

Which comes first? Eggs or chicks? What is inside a chicken’s egg? • Shell • Egg white • Yolk • Embryo

2. By giving birth to the young • The fertilised egg develops in the mother’s body and becomes an embryo. • The mother gives birth to the baby after a period of time. The newborn baby feeds on its mother’s milk.

How do these animals reproduce?

Which animal below lay eggs? Which animal gives birth to its young?

Birds, insects and fish lay eggs.

Mammals give birth to their young.

The Chinese University of Hong Kong Postgraduate Diploma of Education (Primary) DEP 5114 A (2000 -2001) Professor Mak Se Yuen Producer: Fong Pui Ting Karen (99236240) 9 April, 2001

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