Ilorin - Kwara state, Nigeria

Tag: fish

Insightful. Explicit. Informative.

How did fish and mammals evolve?

Fossils show that the first fish occurred in the Ordovician Period which began about 460,000,000 years ago. These fish were jawless, and the most primitive of all. Their mouths were a simple opening, suited to feeding on the tiny animals that lay hidden in the mud. Next came fish with jaws. Jaws allowed fish to…
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