Consider the following statements 1. Dinosaurs roamed the earth during the Mesozoic era. 2. All Dinosaurus and other reptiles such as Ichthyosaurus and Pterosaurus became extinct due to unknown reasons in Triassic period. Which of the statements given abo

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Q: 63 (CDS-I/2008)
Consider the following statements
1. Dinosaurs roamed the earth during the Mesozoic era.
2. All Dinosaurus and other reptiles such as Ichthyosaurus and Pterosaurus became extinct due to unknown reasons in Triassic period.
Which of the statements given above is/are correct ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,14,27,14,5,16,6

keywords: 

{'triassic period': [0, 0, 2, 0], 'dinosaurs': [2, 0, 0, 0], 'ichthyosaurus': [0, 0, 1, 0], 'mesozoic era': [0, 0, 2, 0], 'dinosaurus': [0, 0, 1, 0], 'pterosaurus': [0, 0, 2, 0], 'other reptiles': [0, 0, 2, 0]}

The correct answer is option 1, which states that only statement 1 is correct. Let`s dissect each option to understand why.

Option 1 states that statement 1 is correct. This means that dinosaurs did indeed roam the earth during the Mesozoic era. This statement is true as the Mesozoic era, also known as the Age of Dinosaurs, spanned from about 252 million years ago to 66 million years ago, during which dinosaurs dominated the land.

Option 2 states that statement 2 is correct. This statement claims that all dinosaurs, as well as other reptiles such as Ichthyosaurus and Pterosaurus, became extinct in the Triassic period due to unknown reasons. However, this statement is incorrect. While some dinosaurs did become extinct in the Triassic period, the mass extinction event that wiped out most dinosaurs occurred at the end of the Cretaceous period, about 66 million years ago. Additionally, Ichthyosaurus and Pterosaurus are not dinosaurs but different types of reptiles.

In conclusion, only statement 1 is correct, and the correct answer is option 1.