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According to Darwin, a new species arises due to which of the following two factors?
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Natural selection and branching descent
Mutation is sudden or developed change in genetic sequence discovered by Hugo De Vries.
Useful variation helps an organism to utilise its resources more efficiently so that its chance of survival increases and it may produce more progeny to evolve new population.
Useful variation helps an organism to utilise its resources more efficiently so that its chance of survival increases and it may produce more progeny to evolve new population.
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