1. Which is not true regarding parasites ?   They live on or inside the other organism.   Leech is a parasite.   They are always beneficial to the other organism.   They derive their food from the organism on which they live.   Hint Half-n-half Clue   2. Autotrophic component of the ecosystem   Consumers   Producers   All of these   Decomposers   Half-n-half Clue   3. Which is not a 'biotic part' of the ecosystem ?   Plants   Insects   Water   Bacteria   Half-n-half Clue   4. Nitrogen-fixing bacterium   Salmonella   Lactobacillus   Rhizobium   Clostridium   Half-n-half Clue   5. Which is not a 'nonrenewable' source of energy ?   Soil   Coal   Wind   Petrol   Half-n-half Clue   6. Which is a by-product of photosynthesis ?   Carbon dioxide   Nitrogen   Oxygen   ATP   Half-n-half Clue   7. The response of plants to light is known as   Phototropism   Chemotropism   Hydrotropism   Thigmotropism   Half-n-half Clue