NEW VIEW. “Yet, far removed from this classical conception, a small but growing body of evidence accumulated, which reveals that this physiological division of labor could also be accomplished by different species living together, as exemplified by the discoveries, in the latter 19th century, of the duality of lichens, of fungi living in the roots of orchids and forest trees, of nitrogen-fixing bacteria in root nodules of legumes, and of algae living inside the cells of translucent cnidarians.”
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