A location with luxuriant growth of lichens on the trees indicates that the:
| 1. | Trees are very healthy | 2. | Trees are heavily infested |
| 3. | Location is highly polluted | 4. | Location is not polluted |

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The ‘photobiont’ [photosynthetic component] in a Lichen can be:
| I. A green alga | II. A cyanobacterium |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |

To unlock all the explanations of this course, you need to be enrolled.

To unlock all the explanations of this course, you need to be enrolled.