Question

How many of the following are true w.r.t. first cellular forms originated on earth?
a. They were probably single cells.
b. They were present in water environment.
c. They probably arose rapidly through evolutionary forces from living molecules.
d. Did not possibly originate till about 2000 mya.

Answer 1

The first forms of life possibly arose slowly through evolutionary forces from non-living molecules.
The earliest life forms known were microscopic organisms that left signals of their presence in rocks about 3.7 billion years old.

Prokaryotes were the earliest life forms, simple creatures that fed on carbon compounds that were accumulating in Earth's early oceans.