Fish first appeared: a) after the "Age of the Dinosaurs" during the Mesozoic Era. b) during the Ordovician Period of the Paleozoic Era. c) in the Cretaceous Period of the Mesozoic Era. d) when land plants evolved during the Carboniferous Period. e) when amphibians dominated the oceans.

Question

Jaelyn Brandt

Biology

10 November, 20:06

Fish first appeared: a) after the "Age of the Dinosaurs" during the Mesozoic Era. b) during the Ordovician Period of the Paleozoic Era. c) in the Cretaceous Period of the Mesozoic Era. d) when land plants evolved during the Carboniferous Period. e) when amphibians dominated the oceans.

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Pamela Lowery · Answer 1

during the Cambrian Period of the Paleozoic Era.

Explanation:

The Paleozoic is the earliest era (of three) of the Phanerozoic Eon and is composed of six geologic periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian (in that order from earliest to the latest). Fish first appeared about 530 million years ago during the Cambrian explosion.