The relationship between the fungi and algae in lichens is best described as
A. a possible controlled parasitism wherein the fungi withdraw food from the algae and the algae do not benefit from the association.
B. a possible controlled parasitism wherein the algae are moistened and protected by the fungi, but the fungi do not benefit from the association.
C. a simple cooperative mutualism between normally free-living strains.
D. an endosymbiotic transfer of the chloroplasts of algae to the hyphae cells.
E. a complete mixing of the genomes of the two groups at the cellular level.
Answer: A
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