1. Which of the following is biodegradable waste?

2. Which of the two sets belong to the same trophic level?

3. In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?

4. Which of the following is the best way for disposal of vegetable and fruit peels?

5. The problem caused due to ozone hole is

6. An ecosystem includes

7. Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as

8. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

9. Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called

10. Excessive exposure of humans to UV-rays results in