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  1. Jurassic period of the mesozoic era was characterised by
    1. Radiation of reptiles and origin of mammal-like reptiles
    2. Dinosaurs become extinct and angiosperms appeared
    3. Flowering plants and first dinosaurs appeared
    4. Gymnosperms were dominant plants and first birds appeared
Correct Option: D

Jurassic period of meoszoic era was about 19-20 crore years ago & lasted for about 5.5-6 crore years. The climate was hot and damp. It is called the age of dinosaurs. Ist primitive bird Archaeopteryx evolved from reptiles. Ist angiosperm appeared as a dicotyledon but gymnosperms were dominant.



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