Across
- 4. This bacterium converts the atmospheric nitrogen into nitrates.
- 7. The process of inhalation and exhalation
- 8. The process by which plants prepare their own food
- 9. Organisms which are on the verge of the living and non-living
- 10. This gas is essential for combustion
Down
- 1. Plants growing in hot and dry regions such as deserts
- 2. It contains ovary of the flowers
- 3. Water trapped below the ground over the bedrocks
- 5. These rays are absorbed by the ozone layer
- 6. A plant having thin, long and weak stem which cannot stand upright and spreads on the ground