1. When water is boiled, it is converted into steam. This is an example of conversion of _______ energy to mechanical energy.   Light   Atomic   Chemical   Heat   Hint Half-n-half Clue   2. Nitrogen-fixing bacterium   Salmonella   Clostridium   Rhizobium   Lactobacillus   Half-n-half Clue   3. Which is not a 'biotic part' of the ecosystem ?   Plants   Bacteria   Insects   Water   Half-n-half Clue   4. Autotrophic component of the ecosystem   Decomposers   Producers   All of these   Consumers   Half-n-half Clue   5. Which is not a 'nonrenewable' source of energy ?   Wind   Soil   Petrol   Coal   Half-n-half Clue   6. Interaction between organisms of different species so as to get benefit from each other is known as   Symbiosis   Saprophytism   Etiolation   Predation   Half-n-half Clue   7. Man is an amphibian.   True   False