1. Which is not a 'biotic part' of the ecosystem ?   Water   Insects   Bacteria   Plants   Hint Half-n-half Clue   2. Belladona has medicinal properties.   False   True   3. Movement of organisms away from the sunlight is known as _______.   Negative phototaxis   Autotrophism   Photoperiodism   Positive phototaxis   Half-n-half Clue   4. Which is a by-product of photosynthesis ?   Carbon dioxide   ATP   Nitrogen   Oxygen   Half-n-half Clue   5. The response of plants to light is known as   Phototropism   Hydrotropism   Thigmotropism   Chemotropism   Half-n-half Clue   6. Nitrogen-fixing bacterium   Clostridium   Salmonella   Lactobacillus   Rhizobium   Half-n-half Clue   7. Saprophytes derive their food from dead organisms.   False   True