The first cells or primitive cells were

Following are the two statements regarding the origin of life.
$(A)$ The earliest organisms that appeared on the earth were non-green 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?

Define and explain the terms $Abiogenesis$ and $Biogenesis$.

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

Life on Earth first originated in .........

How many years ago did invertebrates originate (in $mya$)?