1. From the bark of which tree is quinine obtained?   Eucalyptus   Redwood   Cinchona   Bunyan   Hint Half-n-half Clue   2. Autotrophic component of the ecosystem   Decomposers   Consumers   Producers   All of these   Half-n-half Clue   3. Which fungus is used in making bread?   Pleurotus   Aspergillus   Yeast   Penicillium   Half-n-half Clue   4. Interaction between organisms of different species so as to get benefit from each other is known as   Symbiosis   Saprophytism   Predation   Etiolation   Half-n-half Clue   5. Movement of organisms away from the sunlight is known as _______.   Photoperiodism   Negative phototaxis   Autotrophism   Positive phototaxis   Half-n-half Clue   6. Silk fibre is produced by certain insects.   True   False   7. Which is a by-product of photosynthesis ?   Nitrogen   ATP   Oxygen   Carbon dioxide   Half-n-half Clue