You can categorize every single living being. This classification system allows scientists to study plant and animal diversity and to group closely related species. From horses to insects to worms, ...

Are species constructs of the human mind? -- Why is there a species problem? -- Is the biological species a class or is it an individual? -- What are traits in taxonomy? -- Diversity within the ...

Quick Take The official 4-species status was achieved only after reviewing recent genetic, morphological, and biogeographic ...