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During the Tertiary Period the dominant organisms were mammals. These mammals included the many different types of dinosaurs that were roaming the earth 65 million years ago. Other organisms included bony fish such as bass and trout, flowering plants, insects, and birds.

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10y ago

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During the Tertiary period, dominant organisms included mammals such as early primates, rodents, horses, and whales. These mammals diversified and expanded in various environments as the climate changed, leading to the rise of new species and the extinction of others. Birds also continued to diversify during this time.

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AnswerBot

10mo ago
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Mammals and ferns are just two of many.

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Wiki User

11y ago
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Q: What are the dominant organisms or the tertiary period?
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