Question 5:
How are the areas of study − evolution and classification − interlinked?
Answer:
Classification involves grouping of organism into a formal system based on similar-
ities in internal and external structure or evolutionary history.
Two species are more closely related if they have more characteristics in common.
And if two species are more closely related, then it means they have a more recent
ancestor.
For example, in a family, a brother and sister are closely related and they have a
recent common ancestor i.e., their parents. A brother and his cousin are also related
but less than the sister and her brother. This is because the brother and his cousin
have a common ancestor i.e., their grandparents in the second generation whereas
the parents were from the first generation.
With subsequent generations, the variations make organisms more different than their
ancestors.
This discussion clearly proves that we classify organisms according to their
resemblance which is similar to creating an evolutionary tree.
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