Question

Age of fishes is also known as
A. Permian era
B. Silurian era
C. Devonian era
D. Ordovician era

Answer 1

Hint: Fishes are aquatic animals and bear gills which are meant for respiration. Fishes are ectothermic (cold-blooded) organisms. They are the earliest organisms found on the planet earth. They are soft bodied chordates which possess notochord.

Complete answer:
The Age of fishes is also known as Devonian era.
The Paleozoic era is also known as the era of ancient life. This era is divided into six sub-eras:
> Cambrian era: In this era many types of primitive animals evolved and small ocean invertebrates (animals without backbone) were found abundantly.
> Ordovician era: In this era the first fish was evolved. Plants colonized the land for the first time and animals still live in the water.
> Silurian era: In this era, the vascular plants appeared and the corals appeared and fishes were still evolving.
> Devonian era: It is the era of fishes. Fishes with lobed fins appeared and they could breathe oxygen by raising their heads outside the water. The first seed plants also evolved. Seed stores the reserve food material for plants to meet their nutrient demands.
> Carboniferous era: In this era, amphibians start to colonize the land but they have to return to water for reproduction. After amphibians, reptiles also appeared which are the first animals to reproduce on land.
> Permian era: In this era major land masses collided to form the supercontinent known as Pangaea. This era ended with mass extinction because the temperature is very high and the climate is dry.

So the correct answer is option C.

Note: From the above solution we came to know that the Paleozoic era starts with Cambrian explosion and ends with the Permian mass extinction. The Paleozoic era ended with the largest extinction event in the history of earth and the Permian mass extinction is also known as Triassic extinction.