The Doctrine of Descent and Darwinism |
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able according actual adaptation advance already animals apes appearance become beginning birds body causes character characteristics closely common comparative complete connection continent Darwin definite derivation direct division doctrine of Descent effects embryonic entirely example exhibit existence explained external extremely facts families fish follows formation forms further genera given Goethe gradually groups higher human idea important individual infer intermediate islands known language latter less likewise limits linguistic living lower mammals manner means merely mind nature observations occur organisms origin pedigree perfect period phase phenomena placenta plants portion position possess possible present probably produced progress proved question races recent regard relations remains represented reproduction result says selection separate sexual sexual reproduction shown shows side similar single species structure systematic theory tion transformation true varieties various vertebrate whole