Question

Assertion :The number of cells in a multicellular organism is inversely proportional to size of body. Reason: All cells of biological world are of the same size.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

Answer: (D)

Multicellular organisms are composed of many specialized cells. The cells differ in size, shape and function. In multicellular organisms, the number of cells determines the size of the organism. An adult human is composed of approximately 100 trillion cells and has over 200 different types of specialized cells. Thus, the correct answer is option D.