Heat-stable enzymes (active at $80^{\circ}C - 90^{\circ}C$) are typically isolated from which group of organisms?

Most living organisms cannot survive at temperatures above $45\,^{\circ}C$. How are some microbes able to live in habitats with temperatures exceeding $100\,^{\circ}C$?

Plant pathogenic bacteria are usually ..........

Which of the following statements is correct for the given figure?

Which of the following is a mycoplasmal disease?

Match the organisms in Column-$I$ with habitats in Column-$II$.

Column-$I$	Column-$II$
$(a)$ Halophiles	$(i)$ Hot springs
$(b)$ Thermoacidophiles	$(ii)$ Aquatic environment
$(c)$ Methanogens	$(iii)$ Guts of ruminants
$(d)$ Cyanobacteria	$(iv)$ Salty area

Select the correct answer from the options given below: