Available Answers

1. 1.

   Define an ecosystem.
2. 2.

   Give four ways to show that how plants are dependent on animals.
3. 3.

   Give four ways to show that how plants and animals are dependent on the physical environment.
4. 4.

   What is a food chain? Write any two food chains
5. 5.

   With a diagram, explain a food web.
6. 6.

   Give briefly the concept of ecological balance.