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Subject:

single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...

Subject:

a special kind of biological identification key which consists of sets of organised pairs of...

the choice and use of words that fit a context best; the particular words a writer or speaker...

a reference book that provides information about words. Dictionaries may provide:

  • ...
Subject:

minerals and vitamins that are taken as nutritional supplements to regular food (in the form of...

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