Biology

The correct answer is B.Nucleus.

Eukaryotic cells have a nucleus, which is a membrane-bound organelle that contains the cell's genetic material (DNA). This distinguishes eukaryotes from prokaryotes, which lack a nucleus. In prokaryotic cells, the DNA is not enclosed in a membrane but instead is found in a region called the nucleoid.

Here’s a quick breakdown of the structures listed:

A.Cytoplasm: Both eukaryotic and prokaryotic cells have cytoplasm, the gel-like substance that fills the cell and surrounds the organelles or structures.

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