Question

What are the theories about how life was formed on earth?

Answer 1

The earth and various planets were created due a Big Bang in the space. In the beginning the earth was a sphere of fire. The upper crust cooled down it is known as lithosphere. There various micro- organisms were successful to survive. The micro- organisms evolved by time and become prokaryotes which had not well defined nucleus and organals. Then they evolved into eukaryotes which had well defined nucleus and cell organals. Evolution continues and now we can see the life around us.

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Answer 2

$\huge\pink{The\: Theories\: Were- }$

$\blue{Theory\: Of\: Special\: Creation:}$

⭐It states that God creates life by his divine act of creation.

$\blue{Theory\: Of\: Panspermia\: Or\: Cosmozoic:}$

⭐ It was given by Aristotle. It states that the spores or pamspermia cane from outer space and developed into living forms.

$\blue{Theory\: Of\: Spontaneous\: Generation:}$

⭐ It states that life originated from decaying and rotting natter like straw, mud, etc. This theory is also known as theory of abiogenesis or autobiogenesis.

$\blue{Theory\: Of\: Chemical\: Evolution: }$

⭐ It states that life originatef from pre-existing non-living organic molecules and that formation of life was preceded by chemical evolution.