1. What is the name given to the green pigment in plants ?   Chlorophyll   Tendrils   Stomata   Starch   Hint Half-n-half Clue   2. When water is boiled, it is converted into steam. This is an example of conversion of _______ energy to mechanical energy.   Light   Heat   Atomic   Chemical   Half-n-half Clue   3. _______ convert chemical energy to electrical energy.   Air conditioners   Microwave ovens   Battery cells   Bulbs   Half-n-half Clue   4. From the bark of which tree is quinine obtained?   Eucalyptus   Redwood   Cinchona   Bunyan   Half-n-half Clue   5. Autotrophic component of the ecosystem   Decomposers   Consumers   Producers   All of these   Half-n-half Clue   6. Which organism is helpful in making the soil fertile ?   Ringworm   Beetle   Roundworm   Earthworm   Half-n-half Clue   7. Silk fibre is produced by certain insects.   False   True