Q. Jurassic period of the mesozoic era is characterised by :
(a) Gymnosperms are dominant plants and first birds appear
(b) Radiation of reptiles and origin of mammal like reptiles
(c) Dinosaurs become extinct and angiosperms appear
(d) Flowering plants and first dinosaurs appear
Solution :
Correct option : A The Jurassic Period was the second segment of the Mesozoic Era. It occurred from 199.6 to 145.5 million years ago, following the Triassic Period and preceding the Cretaceous Period. The most important event in this period include dominance of reptiles, gymnosperms continue as dominant and origin of toothed birds (first birds).