1. Nitrogen-fixing bacterium   Salmonella   Rhizobium   Clostridium   Lactobacillus   Hint Half-n-half Clue   2. The property of plants to manufacture their food is known as _______.   Autotrophism   Phototaxis   Photokinesis   Phototropism   Half-n-half Clue   3. Autotrophic component of the ecosystem   Decomposers   Producers   Consumers   All of these   Half-n-half Clue   4. Belladona has medicinal properties.   False   True   5. Saprophytes derive their food from dead organisms.   True   False   6. Which is not a 'biotic part' of the ecosystem ?   Insects   Plants   Bacteria   Water   Half-n-half Clue   7. Light energy is converted into chemical energy by the process of   Photoperiodism   Photokinesis   Symbiosis   Photosynthesis   Half-n-half Clue