The RNA world hypothesis proposes that RNA, not DNA, was the primary genetic material in early life. Which characteristic of RNA makes it a more plausible candidate for this role compared to DNA?

In the early earth, organic acids were produced by the combination of ${{\rm{H}}_2}$ with

Urey –Miller’s experiment mixture had the following except

The …A… from the sun broke up water into hydrogen and oxygen and the …B… escaped. Oxygen combined with ammonia and methane to form …C… . CO$_2$ and others. The ozone layer was formed. As it cooled, the water vapour fell as rain, to fill all the depressions and form …D… Choose the correct option for A,B,C and D to complete the given paragraph, to NCERT textbook

What happened to ${\rm{N}}{{\rm{H}}_3}$ present in the primary atmosphere during its conversion to the secondary atmosphere?

Which of the following gases was likely NOT abundant in the early Earth's atmosphere?

Which gas was likely ABSENT in the early Earth's atmosphere according to the Oparin-Haldane hypothesis?

Which of the following is NOT a key feature of the Oparin-Haldane theory of the origin of life?

Which of the following was absent in the atmosphere at the time of origin of life ?

According to one of the most accepted theory, the earth atmosphere before any life had originated consists of ${{\rm{H}}_2}{\rm{O}},{{\rm{H}}_2},{\rm{N}}{{\rm{H}}_2}$ and

Which was absent in the atmosphere at the time of origin of life?