Which of the following arrangement of periods of the mesozoic era gives a correct sequence from the earliest to the latest?
1. Jurassic, Triassic, Cretaceous
2. Triassic, Jurassic, Cretaceous
3. Permian, Jurassic, Triassic
4. Devonian, Permian, Jurassic
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Cretaceous period of the Mesozoic era is characterised by which of the following
1. Gymnosperms are dominant plants and first birds appear
2. Dianosaurs become extinct and gymnosperms appear
3. Flowering plants disappear
4. Radiation of reptiles and origin of mammal-like reptiles
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The Permian period, during which the first most modern orders of insects appeared occurred approximately
1. 80 million years ago
2. 150 million years ago
3. 280 million years ago
4. 550 million years ago
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