Origin of life and formation of macromolecules.?

Question

how life is originated?
how these dna rna proteins nucleotides etc formed?
what mde organs like stomach,liver,lungs etc?
how their functions were defined?
why organisms have competition..?

Answer 1

DNA took many millions of years to evolve. The first steps were organic compounds made from natural chemical reactions. Many of these steps can be reproduced in laboratories, such as making ribose (a key compound of DNA). Many scientists believe that simple chemical reactions produced the first shards of RNA, some phenotypes of which eventually had the right sequence of nucleobases to produce proteins and reproduce. Other scientists argue that it is more likely that protein synthesis and the storage of information came first (this is chemically possible in the absence of nucleic acids) and RNA came later. Whichever view is correct, a chemical as complicated as DNA came much, much later. The first simple single celled organism is thought to have evolved only after about a billion years of precursor evolutionary events.

Organs are made of proteins, and their formation is directed by genes. Species with specialized organs came much, much later in our planet's history.

Answer 2

that would require the longest answer ever!

basically RNA molecules assebled by chance collisions of its componant molecules and underwent many recombinations until it was in a sequence that foled specifically so that it enabled one molecule of RNA to synthesise another. purely by chance some RNA was enveloped by lipid making a sphere of lipid membrane containing RNA cabable of synthesising its self and other molecules and was essentially the first cell.

I dont know how it got past that but organs form by random mutations in genes that produce a differnt function to what they did origionally. for instance the eye started as a patch of light sensitive skin, then random mutations caused a rare few to develop a better or more sensitive light sensing organ which gave these few an advantage over those that hadnt allowing them to thrieve, out competing those with the basic light sensing organs. millions of tiny little improvments by mutations followed by selection are required to form or improve organs.

competition is what drives evolution, without it we would still be very simple single cells. But it is impossible for competition not to take place at all in nature as the organism which is most suited to an environment will always out compete others.

Answer 3

Since formation must follow information and the sequences must occur simultaneously, none of these options can be correct. It takes a village - not isolated sequences.

Answer 4

The 'science' of the origin of life is called abigenesis.
More a hopeful philosophy than a science.
True science indicates that life does not come from non-life.

http://www.googlesyndicatedsearch.com/u/creationontheweb?hl=en&ie=ISO-8859-1&q=abiogenesis&btnG=Search

Answer 5

None of these questions have concrete answers in science.