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Which of the following is the simplest living organism?

Which of the following is the simplest living organism?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Paramecium
  • B Virus
  • C Amoeba
  • D Chlamydomonas
Correct Answer: Option B
Explanation:
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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