• Prokaryotes: The cells having nuclear material without nuclear membrane are termed as prokaryotic cells. The organisms with these kinds of cells are called prokaryotes.
Examples: Bacteria and blue green algae.
• Eukaryotes: The cells having a well-organized nucleus with a nuclear membrane are termed as eukaryotic cells. The organisms with these kinds of cells are called eukaryotes.
Examples: Onion cells and cheek cells.

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