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What is meant by speciation? List four f...

What is meant by speciation? List four factors that could lead to speciation. Which of these cannot be a major factor in the speciation of a self-pollinating plant species. Give reason to justify your answer.

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Speciation is the evolution of reproduction isolation among once interbreedin​g ​population
Genetic drift : Over generation genetic drift may accumlate which leads to spectiation
Natural selection : Natural selection which may give rise to speciation
Servere DNA change
A variation may occur which does not allow sexual act between two groups.
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List any two factors that could lead to speciation?

Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?

Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?

(i) A husband has 46 chromosomes, his wife has 46 chromosomes. Then why don't their offsprings have 46 pairs of chromosomes, which is obtained by the fusion of male and female gametes? (ii) "Geographical isolation is not a major factor in the speciation of a self pollinating plant species." Justify this statement with the help of an example.

What factors could lead to the rise of a new species?