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Standard X
Biology
Mutation Theory & Neodarwinism
According to ...
Question
According to De Vries' theory, evolution is
A
Discontinuous
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B
Jerky
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C
Continuous and smooth
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D
Both A and B
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Solution
The correct option is
A
Both A and B
According to De Vries theory of evolution:
Mutation or discontinuous variation is the raw material of evolution.
The mutation appears suddenly and produced their effect immediately.
Mutants are different from the parents and there is no intermediate stage between the two.
The same type of mutation can appear in several individuals of a species.
Mutation can appear in all direction and all mutations are the inheritance
Useful mutations are selected by nature an lethal mutations are eliminated.
So, the correct option is 'Both A and B'.
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