Passage: 'Lichen is not a single organism, but rather a remarkable mutualistic partnership between a fungus and a photosynthetic partner, typically an alga or a cyanobacterium. The fungus provides structural protection, moisture retention, and mineral nutrients, while the photosynthetic partner synthesizes organic sugars through photosynthesis. This symbiotic adaptation allows lichens to thrive on bare rock, alpine tundra, and desert crusts where neither partner could survive alone.' The relationship between the fungus and alga in a lichen is an example of...
Answer and explanation
Correct answer: C. Mutualistic symbiosis where both organisms derive essential survival benefits
The text explicitly describes a 'mutualistic partnership' where both partners contribute and benefit, enabling survival in extreme habitats.
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