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Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
- Pseudomonas
- Mycoplasma
- Nostoc
- Bacillus
Correct answer: Mycoplasma
Solution
Mycoplasma are the smallest known living cells and they lack a definite cell wall, which makes them distinctive among bacteria. They are pathogenic to both plants and animals and can survive without oxygen, matching all parts of the description.
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