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Everywhere the average number of hours of annual sunshine varies from 60 to
80 percent of the total amount possible. Plant life. The veld regions support an
enormous variety of natural vegetation. No particular species is ubiquitous, and ...
Algal abundance and diversity varies from one environment to the next, just as
plant abundance and diversity varies from tropical rain forests to deserts.
Terrestrial vegetation (plants and algae) is influenced most by precipitation and ...
FORM AND FUNCTION The rootstock varies from creeping rhizomes, bulbs,
corms, and tubers, all of which are modifications of the stem, to thickened storage
roots with buds at the stem end. The plants are usually perennials, very rarely ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review
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For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review