Answers

  • Brainly User
2014-10-19T17:51:56+05:30
You can do on need for oxygen for survival of human beings.or for nutrition u can show  experiments on types of food components found in food
1 3 1
2014-10-19T18:31:16+05:30
You can show working model of

Human digestive system
                    OR
Transportation system
                    OR
Excretery system.
1 5 1