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प्रश्न
Lichen is considered as a good example of obligate mutualism. Explain.
उत्तर
Lichen is a mutual association of an alga and a fungus, where the algal partner nourishes and provides shelter to fungi, in tum fungi confers protection from bacterial infections and also maintains moisture for algal growth.
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| Column I (Interaction) | Column II (Examples) | ||
| I. | Mutualism | i) | Trichoderma and Penicillium |
| II. | Commensalism | ii) | Balanophora, Orobanche |
| III. | Parasitism | iii) | Orchids and Ferns |
| IV. | Predation | iv) | Lichen and Mycorrhiza |
| V. | Amensalism | v) | Nepenthes and Diaonaea |
