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simple inorganic chemical substances (mineral salts) that are needed in relatively large amounts for normal growth and development of a living organism.
a small finger-like projection found on the inner folds of the small intestine, which increases...
plants that live in areas with a moderate water supply where it is neither wet nor dry.
the immunity with which an organism is born.
outgrowths of neurons (nerve cells) that transmit nerve impulses towards the cell body.