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Mammals did not evolve significantly during the Mesozoic period primarily due to the dominance of dinosaurs, which occupied many ecological niches and limited opportunities for mammals to diversify. Additionally, early mammals were small, nocturnal creatures that may have been outcompeted by larger reptiles for resources. The Mesozoic environment favored the reptiles' adaptations for larger size and varied diets, leading to a relatively slow evolutionary pace for mammals until the mass extinction event at the end of the Cretaceous, which allowed mammals to diversify and thrive.

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4d ago

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When did flowering plants evolve?

In the Mesozoic Era, during the cretaceous period


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Mammals made their first appearance during the Mesozoic era in the Triassic period. This period lasted from about 252 million years ago to 201 million years ago. Mammals evolved from their synapsid reptile ancestors during this time.


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The mammals.


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An amphitheriid is a member of the Amphitheriida, an order of mesozoic mammals of the Middle Jurassic period.


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Mammals appeared in the late Triassic period about 220-230 million years ago.


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What mammals are in the group allotheria?

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What period is the age of the mammals?

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How was the Triassic period a transitional time period during the Mesozoic era?

I believe that dont know