In which era was there no life?

Assertion : Coacervates are believed to be the precursors of life.
Reason : Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.

Molecular evolution and origin of life occurred in . . . . . . era.

The evolution of unicellular organisms occurred in which era?

Which of the following was most likely to have been absent in free form in the primordial atmosphere at the time of the origin of life?

There was no life in which of the following eras?