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yellow-green algae

noun, Biology
1.
a group of common single-celled and colonial algae of the phylum Chrysophyta, having mostly yellow and green pigments, occurring in soil and on moist rocks and vegetation and also as a slime or scum on ponds and stagnant waters.
Also, yellow green algae.
Origin
1925-1930
1925-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for yellowgreen algae

yellow-green algae

members of the class Xanthophyceae (division Chromophyta), consisting of approximately 600 species, once classified with the green algae on the basis of similarity of body organization. The Xanthophyceae are distinguished by their food reserve (oil), the quantity of beta-carotene in their plastids, and motile cells with unequal flagella. Frequently their cell walls are two overlapping halves. The usual method of asexual reproduction is by motile zoospores or nonmotile resting aplanospores. Sexual reproduction is rare; the genus Vaucheria is an important exception.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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