Dinosaurs were the dominant form of animal life for a period of about a. 1000 years b.

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Dinosaurs were the dominant form of animal life for a period of about
a. 1000 years
b. 1 million years
c. 100 million years
d. 1 billion years

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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