Question

Mesozoic era was dominated by
(a)Birds
(b)Fishes
(c)Reptiles
(d)Mammals

Answer 1

Hint: Mesozoic era existed from 230 million years ago to 63 million years ago and it was the era of medieval life. It included the Triassic and the Jurassic periods which saw the rise of scaly animals that were supposedly the first animals with a 4 chambered heart.

Complete answer:
The Mesozoic era included three periods: the Triassic period which existed 225 million years ago, the Jurassic period which existed 180 million years ago, and the Cretaceous period around 135 million years ago.
This Mesozoic era saw the origin diversification and finally the extinction of dinosaurs that were huge reptiles.
The Triassic period is marked by the appearance of the first dinosaurs and mammals in the world. In the Jurassic period, there was diversification and domination of large dinosaurs on the Earth.
The Cretaceous period was marked by the origin of modern archaic mammals and modern birds as well as the extinction of giant reptiles and toothed birds.
Thus the Mesozoic era saw the rise of birds and mammals, but it was largely dominated by huge reptiles called dinosaurs.
So, the correct answer is, “Reptiles”

Note: -The Devonian period that existed 395 million years ago belonging to the Palaeozoic era is also known as the “age of fishes” and is marked by the origin of amphibians and the dominance and diversification of fish species on earth.
-The Coenozoic era present 65 million years ago is also known as the“age of mammals” because of the rise of the first placental mammals, their diversification and evolution, as well as the origin and evolution of modern mammals such as humans, occurred during this era.