Lichens have been described as "dual organisms<span>" because they are symbiotic associations between two (or sometimes more) entirely different types of microorganism - a fungus (termed the mycobiont) a green alga or a cyanobacterium (termed the photobiont).
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To act as a catalyst in chemical reactions
The answer is
D. another natural disturbance
Answer:
1.) D. algae
2.) A. mutualism
3.) D. They have no flowers, stems, or roots.
4.) A. Lichens and Mosses
Explanation: