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

Identify the correct sequence in which the following substances appeared during the origin of life on Earth.

Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

The theory that life was transferred to different planets including Earth is known as ...

Two statements regarding the origin of life are given below:
$(a)$ The first organisms that emerged on Earth are believed to have been devoid of chlorophyll and incapable of respiration.
$(b)$ The first food-producing organisms were chemosynthetic and never released oxygen.
Based on the above statements,which of the following options is correct?

$A$: Theory of biogenesis explains that life arises from pre-existing life. $R$: Louis Pasteur finally disapproved the theory of spontaneous generation of life.