Bacteria do not have a well defined _____.

nucleus

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cell wall

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plasma membrane

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cytoplasm

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Solution

The correct option is A nucleus
Based on the structure of nucleus, cells are of 2 types- prokaryotic and eukaryotic cells.
Prokaryotic cells do not have a well defined nucleus. Their nuclear membrane is absent. Bacteria is a unicellular, prokaryotic organism.
Eukaryotic cells have a well defined nucleus covered by a nuclear membrane. Protists, fungi, plants and animals are eukaryotic organisms.

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Bacteria do not have a well defined nucleus. Since the nucleus contains DNA, it can be concluded that bacteria do not contain DNA.

Organisms belong which of the following kingdoms do not have a well-defined nucleus?

Bacteria do not have a nucleus. Since the nucleus contains DNA, it can be concluded that bacteria do not contain DNA.

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