Question

Why first organism born in water

Answer 1

When the Moon was created, basic chemical activity had already started on the surface of Earth.  This means that atoms of elements like Hydrogen, Carbon, Oxygen, Nitrogen and Phosphorous had already began to combine to form molecules in simple chemical reactions.   Also, organic (but not necessarily live) molecules could have come to Earth on meteorites which would often hit Earth in those times. Thus were created conglomerations of molecules (perhaps due to proximity) called nucleotides which were the first building blocks of life that was yet to come.  These are classified today as the prebiotic times in the Archean Era.  Then, in an event about 4.3 billion years ago, called Progenote, these nucleotides combined into a single strand to form RNA (RNA stands for Ribonucleic Acid) in a helical form by a normal, simple chemical reaction.  Now, as RNA forms, it builds up a code (which is nothing but a sequence of molecules and has no life) and has the inherent ability to proliferate and must have started doing so as a purely chemical activity.  Then, in accordance with Darwin’s Theory of Natural Selection, some variants of this RNA became better at self-replication than others and produced better “offspring” sending the others into extinction.  This replication just proliferated like a simple everyday chemical reaction takes place in a laboratory beaker.  Thus was created a “RNA World” which had the beginnings of life (but was not “alive”) and this continued for the next billion years “improving” its own replicability and sustainability in the environments of those eras.

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