Question

Golden age of dinosaurs was during
A.Coenozoic era
B.Paleozoic era
C.Archeozoic era
D.Mesozoic era

Answer 1

Hint: Dinosaurs are a diverse group of reptiles which first appeared during the Triassic period. They are now the extinct species, however the research on their origin is still ongoing.

Complete answer:
Let us analyze the options to find out the correct option.

Option A: Coenozoic era is the third of the major era’s on the Earth. It began about 66 ,millions years ago extending to present. It was the time of interval during which continents assumed their modern configuration and geographic positions. At this time the Earth’s flora and fauna evolved towards the present. Therefore, this is the incorrect option.

Option B: Paleozoic era is the earliest of the three geologic eras. It is the longest Phanerozoic eras lasting from 541 to 251.902 million years ago. It is further divided into six geologic periods. This does not include the Dinosaurs in their age. Therefore, this is the incorrect option.

Option C: Archeozoic era was from 3.8 to 2.5 billions years ago and was marked by an atmosphere with little free oxygen, development of unicellular life, and the formation of first rocks and oceans. Therefore, this is the incorrect option.

Option D: The Mesozoic era is considered as the era of middle life which was the golden age of the dinosaurs. It lasted from 245 to 65 million years ago and is further divided into three periods. It is also called Age of Reptiles and Age of Conifers. It began with supercontinent Pangaea. When the Pangaea broke up the continents drifted apart. This led to continents changing climates and tremendous volcanic activity. Therefore, this is the correct option.

Hence, the correct answer is option (D)

Note: In the Mesozoic era the mass extinctions occurred at the end of the Triassic and Cretaceous Periods. The first extinction paved the way for a dinosaur takeover. During the second extinction, the dinosaurs finally disappeared.