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Which group of animals filled the skies during the Cretaceous period?
Which group of animals filled the skies during the Cretaceous period?
What is believed by some scientists to have possibly caused the extinction of more than half the planet's species at the end of the Cretaceous period?
What is believed by some scientists to have possibly caused the extinction of more than half the planet's species at the end of the Cretaceous period?
What was cooling and moistening the planet's climate at the end of the Cretaceous period?
What was cooling and moistening the planet's climate at the end of the Cretaceous period?
What was left behind by vanished dinosaurs at the end of the Cretaceous period?
What was left behind by vanished dinosaurs at the end of the Cretaceous period?
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What filled the forests of ferns, cycads, and conifers at the start of the Cretaceous period?
What filled the forests of ferns, cycads, and conifers at the start of the Cretaceous period?
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Which of the following statements accurately describes the climate changes during the Cretaceous period?
Which of the following statements accurately describes the climate changes during the Cretaceous period?
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Which of the following dinosaur groups dominated the southern continents during the Cretaceous period?
Which of the following dinosaur groups dominated the southern continents during the Cretaceous period?
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Which of the following creatures faced stiffening competition from the diversifying birds during the Cretaceous period?
Which of the following creatures faced stiffening competition from the diversifying birds during the Cretaceous period?
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According to the passage, which of the following creatures proliferated on the expanded coasts during the Cretaceous period?
According to the passage, which of the following creatures proliferated on the expanded coasts during the Cretaceous period?
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Which of the following statements best describes the distribution of horned dinosaurs like Triceratops during the late Cretaceous?
Which of the following statements best describes the distribution of horned dinosaurs like Triceratops during the late Cretaceous?
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