Which unicellular organism of the following does not possess the organised nucleus?

Bacteria

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Amoeba

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Chlamydomonas

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None of these

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Solution

The correct option is A Bacteria
The kingdom monera is comprised of the prokaryotic organisms. The kingdom is divided into two groups, archaebacteria and eubacteria. They are unicellular or multicellular forming filamentous structures. They do not have well-developed cell organelles such as the nuclear membrane, cell wall, nucleus, mitochondria, etc. Bacteria is a prokaryote while Amoeba and Chlamydomonas are eukaryotes.
Thus, the correct answer is option A.

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