Across
- 4. Organisms that directly or indirectly depend on green plants for nutrition
- 5. Organisms that can make their food from simple non-living substances
- 6. The plant from which a parasite gets it food
Down
- 1. Organisms that live on dead plants and animals and derive their food from them
- 2. The mode of nutrition where two different organisms work together for their mutual benefit
- 3. A bacteria in soil which can convert atmospheric nitrogen into water-soluble compounds