Multiple choice

A lichen shows a mutualistic symbiosis between green algae and ______________ .

  1. chytrid

  2. archeabacterium

  3. ascomycete

  4. fungi
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lichens are composite organisms consisting of a symbiotic relationship between a photosynthetic partner (green algae or cyanobacteria) and a fungal partner. The fungal component is almost always an ascomycete fungus, which provides structure and protection while receiving nutrients from the algae. This mutualistic relationship allows lichens to survive in harsh environments where neither organism could thrive alone.

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