MCQOPTIONS
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| 1. |
Lichens are ecologically important as they [DPMT 1984] |
| A. | Purify air |
| B. | Are pioneers of barren rocks |
| C. | Are symbionts of algae and fungi |
| D. | Are associated with mycorrhizal roots |
| Answer» C. Are symbionts of algae and fungi | |