In the evolution of terrestrial ecosystems, the breakdown of rock into soil is an important step that often depends on the appearance of lichens. Which of these statements about lichens is correct?

Question

Quizplus · Accepted Answer

Lichens are symbiotic associations between fungi and photosynthetic partners, typically algae or cyanobacteria. In this relationship, the fungi provide protection and moisture for the algae, while the algae, through photosynthesis, produce nutrients that feed the fungi. This mutualistic relationship is crucial for their survival in harsh environments, including on bare rock where they can contribute to soil formation.

In the Evolution of Terrestrial Ecosystems, the Breakdown of Rock