1. When water is boiled, it is converted into steam. This is an example of conversion of _______ energy to mechanical energy.   Heat   Chemical   Light   Atomic   Hint Half-n-half Clue   2. Saprophytes derive their food from dead organisms.   True   False   3. Interaction between organisms of different species so as to get benefit from each other is known as   Etiolation   Symbiosis   Saprophytism   Predation   Half-n-half Clue   4. Silk fibre is produced by certain insects.   True   False   5. _______ is made from bamboo plants.   Jute   Rubber   Silk   Paper   Half-n-half Clue   6. From the bark of which tree is quinine obtained?   Eucalyptus   Cinchona   Redwood   Bunyan   Half-n-half Clue   7. The response of plants to light is known as   Phototropism   Thigmotropism   Hydrotropism   Chemotropism   Half-n-half Clue