Which one of the following is correct with respect to Allopatric speciation?
- AThere is no geographical isolation
- BMutations are helpful in allopatric speciation
- CSpecies have evolved due to reproductive isolation
- DMode of evolution in this type of speciation is called adaptive radiation
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Given below are two statements.
Statement $I$ - According to Darwin,the gradual,inheritable variations over a long period of time lead to speciation.
Statement $II$ - According to Hugo de Vries,mutations are the cause of variations.
In the light of above statements,select the correct option given below:
Statement $I$ - According to Darwin,the gradual,inheritable variations over a long period of time lead to speciation.
Statement $II$ - According to Hugo de Vries,mutations are the cause of variations.
In the light of above statements,select the correct option given below:
According to Hugo De Vries, speciation is due to
Species that are separated by geographical barriers are called ........
The two key concepts of Darwinian theory of evolution are:
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View SolutionAccording to $Darwin$,fitness refers to .....
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