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Solution


Q.

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       [2017]
1 Pseudomonas  
2 Mycoplasma  
3 Nostoc  
4 Bacillus  

Ans.

(2)

Mycoplasmas are the smallest living cells, known without a definite cell wall. They are pathogenic to both plants and animals and can survive without oxygen.