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6.Evolution
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The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.
Option A
Option B
Option C
Option D
Solution
Natural disaster like earthquake can cause extinction of species.
During the long period since the origin and diversification of life on earth there were five episodes of mass extinction of species.
Sudden extinction of highly flourished dinosaurs of Jurassic period of Mesozoic era in Cretaceous period ither due to hitting of the earth by an iridium rich meteorite or due to global cooling.
Standard 12
Biology
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