Discussion
Read the following statements carefully and choose the correct option.
Assertion (A) : A distinct centrally located spherical structure in a cell is called Nucleus.
Reason (R) : Nucleus is surrounded by a jelly like structure called cytoplasm.
Answer: A
Both (A) and (R) are true but (R) is not the correct explanation of (A).
The assertion is true: the nucleus is a distinct, usually spherical structure, typically near the centre of the cell. The reason is also true: the nucleus lies in the cytoplasm, the jelly-like substance between it and the cell membrane.
But being surrounded by cytoplasm is not why the structure is called the nucleus or why it is spherical and central. The two statements are separate facts, so (R) does not explain (A).
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