Assertion :Specialization of cells is useful for organism. Reason: It increases the operational efficiency of an organism.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
All living organisms are made up of cells. While the single-celled organisms have cell organelles to perform different life processes, the multicellular organisms rely on all of the organelles and numbers of cell types for survival.
Cellular specialization is the process that determines the types of functions each cell will perform.
The multicellular organisms are composed of many specialized cells, each differing in size, shape, structure and function. These specialized cells with their structural modifications help to increase the operational efficiency of organisms.
Thus, the correct answer is option A.

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