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Why do living organisms always assort themselves into specie

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1. What role have the numerous mass extinctions played in the evolutionary history of life of earth?

2. Among Mary's many contributions to evolution and evolutionary theory is the biological species concept - probably the most widely accepted "definition" of a species that we currently possess. What is the biological species concept and why does it answer a question that Darwin himself asked, "Why do living organisms always assort themselves into species?"

Reference no: EM13936971

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