Question

Which is a difference between the Paleozoic and Mesozoic era?

Animals lived in the water during the Mesozoic and on land in the Paleozoic.
The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic.
Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic.
Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

Answer 1

Answer:

3.Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic.

Explanation:

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Answer 2

The difference between the Paleozoic and Mesozoic era is Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic.

Many species of dinosaurs lived in the Jurassic period of the Mesozoic era, however, they died off in the Cretaceous period of the Mesozoic era itself. In Paleozoic era, no dinosaurs were there.

Animals lived in the water during the Mesozoic and on land in the Paleozoic.

The above statement is wrong as animals lived on land during the Mesozoic while no terrestrial animals can be found in the Paleozoic era. As the first terrestrial life, plants were introduced in the Paleozoic era.

The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic.

Mammals first emerged in the Cainozoic era, and not Mesozoic as mentioned here.

Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

The first flowering plants developed in the Cainozoic era, and not Mesozoic as mentioned here.