1. Which is not a 'renewable' resource of energy ?   Wind   Sun   Petroleum   Water   Hint Half-n-half Clue   2. Which is not true regarding parasites ?   They derive their food from the organism on which they live.   Leech is a parasite.   They are always beneficial to the other organism.   They live on or inside the other organism.   Half-n-half Clue   3. When coal is burnt, _______ energy is converted into light and heat.   Electric   Chemical   Atomic   Half-n-half Clue   4. The response of plants to light is known as   Phototropism   Chemotropism   Thigmotropism   Hydrotropism   Half-n-half Clue   5. Which is not a 'biotic part' of the ecosystem ?   Insects   Bacteria   Plants   Water   Half-n-half Clue   6. Which is a by-product of photosynthesis ?   ATP   Carbon dioxide   Oxygen   Nitrogen   Half-n-half Clue   7. Silk fibre is produced by certain insects.   False   True