Origin of life

Brauneger, Dora (2012) Origin of life. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

In the beggining there was nothing, no time, no space, no particales. Then at some point there was a big explosion called The Big Bang. The Universe was born with every planets, galaxies and stars that are known today. In this big Univers our planet was born, at first bare and hot with constantly active volcanos and boiling hot steam. Soon, thanks to that steam, ocean were made and the atmosphere was created. The surface became cooler and with enough water the chemical evolution could begin. Nobody is sure how it all started. Even the greatest scientists, with all their experiments, weren't able to prove most of the theorys and every time they discover something new questions would arise. Some say that from simple molecules more complex ones were formed, such as amino acids or carbohydrates, which became one of the main compositions of every living being. They claim that there was first the RNA world with RNA chains that could replicate themselves. However, others say that DNA was the first due to its stability. But, even if scientists manage to uncover this mistery there are other questions that also need answering. There are a lot of debates about how the first cell was made. It is said that the complex molecules somehow decided to team up and form an organization that would enable them to survive in different habitats and to pass down genes that are suitable. They call this primitive organization LUCA but unfortunately there are still a lot of questions on this topic and many are discussing a lot of theorys. The scientists are even talking about the possibility that the molecule or the first living cell was brought to Earth from space by meteorites or even by aliens. This theory is called Panspermia and it is becoming more and more popular among the scientists. Whichever theory proves to be correct one, one thing is certain, it will be long before we prove anything without a doubt.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Kalafatić, Mirjana
Date: 2012
Number of Pages: 24
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 10 Oct 2014 11:12
Last Modified: 10 Oct 2014 11:12
URI: http://digre.pmf.unizg.hr/id/eprint/2997

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