1 / 15

Reproduction of animals

Reproduction of animals. ？. Why do animals reproduce?. ？. ？. ？. ？. ？. ？. ？. ？. ？. ？. Animals die…. All animals die when they get old. Some animals die in natural disasters. Some die when there is no food or water. Some are killed by other animals.

fabrizio
Download Presentation

Reproduction of animals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reproduction of animals

  2. ？ Why do animals reproduce? ？ ？ ？ ？ ？ ？ ？ ？ ？ ？

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

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

  5. How do animals reproduce?

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

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

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

  9. 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.

  10. How do these animals reproduce?

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

  12. Birds, insects and fishlay eggs.

  13. Mammals give birth to their young.

  14. The Chinese University of Hong Kong Producer: Fong Pui Ting Karen (99236240) Postgraduate Diploma of Education (Primary) DEP5114A (2000-2001) Professor Mak Se Yuen 9 April, 2001

  15. The End Thank you for watching !

More Related