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  • In which geologic time intervals did the co-evolutionary divergence of avian and mammalian species manifest, accounting for various environmental and biological factors t

In which geologic time intervals did the co-evolutionary divergence of avian and mammalian species manifest, accounting for various environmental and biological factors that shaped their morphological and physiological adaptations?

Option: 1

Eocene and Oligocene periods


Option: 2

Silurian and Devonian periods


Option: 3

Carboniferous and Permian periods


Option: 4

Cretaceous and Triassic period


Answers (1)

best_answer

Birds and mammals underwent co-evolutionary divergence during the Cretaceous and Triassic periods. The Cretaceous period, spanning approximately 145  million years ago, saw the emergence of birds from theropod dinosaurs and the diversification of early mammals. The Triassic period, which occurred about 250 million years ago, they have witnessed the evolution and diversification of mammalian ancestors, while actual birds had not yet emerged. These periods played a crucial role in shaping the morphological and physiological adaptations of avian and mammalian species. Hence, the correct answer is option 4.

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