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Which of the following is the simplest living organism?

Which of the following is the simplest living organism?

A.

Paramecium

B.

Virus

C.

Amoeba

D.

Chlamydomonas

View answer & explanation

Correct answer is B

If viruses, prions, satellites, nanobes, nanobacteria (non-free-living sub-bacterial organisms) are excluded, the simplest free-living organism known is Mycoplasma genitalium, with a genome of only 580,000 base pairs and 482 protein-coding genes.

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