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22 March, 15:12

Scientists find the fossilized remains of a dinosaur in the bottom rock layers of a research site. They find the fossil of a mammal in the middle rock

layers. What can be concluded from this evidence?

A mammals lived on earth before dinosaurs

B dinosaurs lived on earth before mammals

C dinosaurs and mammals lived on earth at the same time

D mammals caused the extinction of the dinosaurs

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Answers (1)
  1. 22 March, 18:12
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    B, the lowest layer is a dinosaur fossil, therefore the mammal fossil was after
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