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acquired characterscharacteristics of an organism which, according to Lamarck (see LAMARCKISM become well developed through use or through environmental influences during an organism's lifetime, and which are inherited by its progeny. However, no clear experimental evidence has yet been found to support the theory. Current opinion is that the environment does play a large part in evolution, though only through NATURAL SELECTION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005