Word: rubra
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Dates: during 1940-1949
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...animals, which live parasitically off the food-making ability of the plant world, these little creatures contain chlorophyll and hence can synthesize food out of water, carbon dioxide in the presence of light. And unlike any of the 250,000 species of plants, one of these animals-Euglena rubra by name-changes its color, now red, now green, to control the amount of light it uses. This phenomenon was explained last week in Physiological Zoology by Leland P. Johnson of Drake University and Theodore Louis Jahn of the University of Iowa...
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