Practice question
Question
A composite organism contains an autotrophic partner that prepares food and a heterotrophic partner that provides shelter and absorbs water and minerals. Which additional observation would support its identification?
Explanation
The organism is a lichen. Its algal phycobiont prepares food, while its fungal mycobiont provides shelter and absorbs water and mineral nutrients. Lichens do not grow in polluted areas and therefore serve as pollution indicators.
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