MCQ
Which developed from the chemical transformation?
- At-RNA
- Bm-RNA
- Cr-RNA
- ✓DNA
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$R$ : Pathogens often develop resistance to existing antibiotics.

$(1)$ Aves - eurythermal
$(2)$ Mammals - stenothermal
$(3)$ Amphibia - stenothermal
$(4)$ Reptile - eurythermal