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Biology: Evolution of Life

📆 October 25, 2024

Total Questions: 23

21. Dinosaurs were: [U.P.U.D.A./L.D.A. (Pre) 2001]

Correct Answer: (d) Mesozoic reptiles
Solution:The Mesozoic Era is the age of the dinosaurs and lasted almost 180 million years from approximately 250 to 65 million years ago. This era includes three well-known periods, called the Triassic, Jurassic, and Cretaceous periods.

The Mesozoic is also known as the "Age of Reptiles" because it was a time of great reptile diversity, including dinosaurs. Dinosaurs, along with other reptiles like pterosaurs and marine reptiles, were the dominant land and sea creatures of the Mesozoic Era.

22. Dinosaurs were in- [U.P. Lower Sub. (Pre) 1998]

Correct Answer: (c) Mesozoic era 
Solution:The Mesozoic Era is the age of the dinosaurs and lasted almost 180 million years from approximately 250 to 65 million years ago. This era includes three well-known periods, called the Triassic, Jurassic, and Cretaceous periods.

he Mesozoic is also known as the "Age of Reptiles" because it was a time of great reptile diversity, including dinosaurs. Dinosaurs, along with other reptiles like pterosaurs and marine reptiles, were the dominant land and sea creatures of the Mesozoic Era.

23. With reference to the evolution of living organisms, which one of the following sequences is correct? [I.A.S. (Pre) 2009]

Correct Answer: (c) Salamander-Python-Kangaroo
Solution:Salamander is a tailed amphibian which appeared about 360 million years ago, Python is a reptile which appeared about 300 million years ago while Kangaroo is a pouched mammal or marsupial which appeared about 145 million years ago. With reference to the question, the correct sequence is 'Salamander-Python-Kangaroo'.
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