How did microrganisms form after bigbang?

Answer 1

How did the big bang form earth?

Answer:

The earth was not formed directly by the big bang.

The big bang formed the primary molecules such as hydrogen & helium

These gasses formed stars which produced some heavier elements like oxygen & carbon but no heavier elements than iron. Iron can not fuse and combine into heavier elements through the nuclear fusion process which takes place in stars because the energy required to sustain such process is not produced in the star.

Elements heavier than iron were believed to be formed by supernova (massive stars which explode at the end of their life). The energy released causes molecule to combine and this created the much heavier elements.

Through accretion (particles sticking together), planets formed when dust sized particles of these elements accumulated to form larger proto type planets which finally combined to form the earth and other planets.

The process took many billions of years for the large first generation stars to form, live and die (explode in supernova), for second generation stars to form from the first and dust particles to combine to planets.