Reptiles like mammals originated in ______________.
A
Jurassic
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B
Cretaseus
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C
Triassic
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D
Permian
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Solution
The correct option is D Triassic
Answer is option D i.e. "Triassic"
The Triassic Period was the first period of the Mesozoic Era and occurred between 251 million and 199 million years ago. During the Triassic period, mammal-like reptiles called therapsids co-existed with ancestors to dinosaurs, crocodiles, mammals, pterosaurs, turtles, frogs, and lizards.
Timeline of the era can be shortly explained as:
Jurassic - 200 million to 145 million years ago - first birds, first mammals.
Cretaseus - 145 million to 66 million years ago - first flowering plant, extinction of dinosaurs.
Triassic Period - 251 million and 199 million years ago - mammal-like reptiles.
Permian period - 299 to 251 million years ago - Fern plants, amphibians, fish, and invertebrates.