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Letter "A" » Alfred Russel Wallace Quotes
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«There is a tendency in nature to the continued progression of certain classes of varieties further and further from the original type.»
Author: Alfred Russel Wallace
(Naturalist, Zoologist)
| Keywords:
classes, continued, original, progression, tendency, type, varieties
«The life of wild animals is a struggle for existence. The full exertion of all their faculties and all their energies is required to preserve their own existence and provide for that of their infant offspring.»
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