Complex with nucleus and membrane bound organelle- can be unicellular or multicellular

Complex with nucleus and membrane bound organelle- can be unicellular or multicellular

• A. Prokaryote
• B. Eukaryote
• C. Virus
• D. Bacterium

Answer: (B)

Having a nucleus and membrane-bound organelles is what defines a eukaryotic cell. This level of internal organization allows more complex structure and function, and eukaryotes can be either single-celled or multicellular, as seen in organisms from yeast to humans. In contrast, prokaryotes like bacteria lack a true nucleus and membrane-bound organelles, and viruses aren’t cells at all—they’re just genetic material inside a protein shell that must hijack a host cell to replicate. So the description best fits eukaryotes.

Having a nucleus and membrane-bound organelles is what defines a eukaryotic cell. This level of internal organization allows more complex structure and function, and eukaryotes can be either single-celled or multicellular, as seen in organisms from yeast to humans. In contrast, prokaryotes like bacteria lack a true nucleus and membrane-bound organelles, and viruses aren’t cells at all—they’re just genetic material inside a protein shell that must hijack a host cell to replicate. So the description best fits eukaryotes.