u/AdministrativeCow300

🔥 Hot ▲ 310 r/AskBiology+1 crossposts

ElI5: Why do humans have pairs of certain appendages or organs but only 1 of others?

Biologically what is the advantage of 1 mouth, nose or heart, but 2 ears, eyes or kidneys?

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u/AdministrativeCow300 — 5 days ago