44. NCERT Exemplar XXIV

Write just a few sentences for an imaginary situation if oxygen disappear from the atmosphere.

If oxygen disappears from the atmosphere, life flourisheslife becomes possiblelife becomes impossible on Earth. It is because oxygen is required for the survival of all living organismssurvival of non-living organisms.

 

During transfusiontranspirationrespiration, animals and plants inhale carbon-di-oxidenitrogenoxygen and give out carbon-di-oxideoxygennitrogen. So in the absence of oxygenpresence of nitrogenabsence of carbon-di-oxide, it is impossible for living organisms to breathe, and they will die eventually. Hence, oxygen is necessary for the organisms on Earth.