How did life come to exist?

Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of evolution that led to more advanced forms of life, including human beings.

What do you think is the condition on early Earth that made the origin of life possible and the first life forms?

The earliest Earth was a ‘naked planet;’ the Hadean Bioscience colleagues describe it as having no ocean or atmosphere when it first formed. Once there was liquid water and an atmosphere, there was a greater chance for prebiotic life to form (the chemical precursors to life on Earth).

Did life start more than once?

IN 4.5 billion years of Earthly history, life as we know it arose just once. Every living thing on our planet shares the same chemistry, and can be traced back to “LUCA”, the last universal common ancestor.

Would life on Earth exist without cell?

Answer 1: No. Cells are one of the characteristics we use to define whether something is alive or not. The only example of something “alive” without cells might be viruses (like what causes chicken pox or the flu) which are just packets of protein and DNA.

Can life arise afresh on Earth even now?

No, it is not possible as the conditions at that time were very different like the temperature of water was very high. So, to generate life we need to have similar conditions.

What is the probability that organic structures are made by accident?

Ilya Prigogine, chemist-physicist, recipient of two Nobel Prizes in chemistry, wrote: “The statistical probability that organic structures and the most precisely harmonized reactions that typify living organisms would be generated by accident, is zero.” (1) That’s right – zero!

Could there have been intelligent life on other planets?

But astronomer Sir Fred Hoyle, together with Chandra Wickramasinghe, in Evolution from Space, said that just as it’s impossible for life to have developed by chance in our solar system, so too there could never have developed intelligent life anywhere else in our entire universe as well.

What is the chance of molecules being formed randomly?

Hoyle wrote as follows: “Biochemical systems are exceedingly complex, so much so that the chance of their being formed through random shuffling of simple organic molecules is exceedingly minute, to a point where it is no different from zero

Can there be an organism without molecules?

One cannot think of having organisms without them. This is precisely the trouble, for to understand how organisms originated we must first of all explain how such complicated molecules could come into being.