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The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated to be distinctively either plant or animal, while, as respects ordinary plants and animals, the difficulty of laying down a definition has become far greater than ever before.

Asa Gray

Biography

Author Profession: Scientist
Nationality: American Quotes
Born: November 18, 1810
Died: January 30, 1888

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