All of the following conditions were present on early earth, except
High temperature
Volcanic storms
Oxidising atmosphere
Reducing atmosphere
Formation of which complex molecules was noticed by Urey and Miller when they subjected substances like $N{H_3},C{H_4},{H_2}O$ etc. to electric discharge
Following are the two statements regarding the origin of life.
$(A)$ The earliest organisms that appeared on the earth were nongreen and presumably anaerobes.
$(B)$ The first autotrophic organisms were the chemoautotrophs that never released oxygen.Of the above statements which one of the following options is correct?
Origin of earth dates back to