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1. Define biodegradable wastes. (1 mark)
2. Define decomposers. Name one decomposer. (1 mark)
3. Which of the following belong to the same trophic level?
Tree, Frog, Snake, Grass, Lizard. (1 mark)
4. Name the group of chemical compounds which damages the ozone layer. (1mark)
5. What would happen if all the decomposers were eliminated from the Earth? Explain with
reasons. (2 marks)
6. Give an example of a food chain operating in fresh water pond. Mention the food habit of
each trohic level
in
this food chain. (2 marks)
7. Consider the food chain: Grass à Deer à Lion.
What will happen, if lions are removed from the above food chain? (2 marks)
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