The Theory of Evolution in 2 Minutes

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"The Theory of Evolution in 2 Minutes: What it is, what it says, how it works" by http://www.youtube.com/DonExodus2

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In biology, evolution is change in the genetic material of a population of organisms from one generation to the next. Though changes produced in any one generation are small, differences accumulate with each generation and can, over time, cause substantial changes in the population, a process that can culminate in the emergence of new species.

Indeed, the similarities amongst species suggest that all known species are descended from a common ancestor (or ancestral gene pool) through this process of gradual divergence.

The basis of evolution is the genes that are passed on from generation to generation; these produce an organism's inherited traits. These traits vary within populations, with organisms showing heritable differences (variation) in their traits. Evolution itself is the product of two opposing forces: processes that constantly introduce variation, and processes that make variants either become more common or rare.

New variation arises in two main ways: either from mutations in genes, or from the transfer of genes between populations and between species. In species that reproduce sexually, new combinations of genes are also produced by genetic recombination, which can increase variation between organisms.

Two major mechanisms determine which variants will become more common or rare in a population. One is natural selection, a process that causes helpful traits (those that increase the chance of survival and reproduction) to become more common in a population and causes harmful traits to become more rare. This occurs because individuals with advantageous traits are more likely to reproduce, meaning that more individuals in the next generation will inherit these traits.

Over many generations, adaptations occur through a combination of successive, small, random changes in traits, and natural selection of the variants best-suited for their environment.

The other major mechanism driving evolution is genetic drift, an independent process that produces random changes in the frequency of traits in a population. Genetic drift results from the role that chance plays in whether a given trait will be passed on as individuals survive and reproduce.

Evolutionary biologists document the fact that evolution occurs, and also develop and test theories that explain its causes. The study of evolutionary biology began in the mid-nineteenth century, when studies of the fossil record and the diversity of living organisms convinced most scientists that species changed over time.

However, the mechanism driving these changes remained unclear until the theories of natural selection were independently discovered by Charles Darwin and Alfred Wallace. Darwin's landmark work On the Origin of Species of 1859 brought the new theories of evolution by natural selection to a wide audience. Darwin's work soon led to overwhelming acceptance of evolution among scientists.

In the 1930s, Darwinian natural selection was combined with Mendelian inheritance to form the modern evolutionary synthesis, which connected the units of evolution (genes) and the mechanism of evolution (natural selection). This powerful explanatory and predictive theory directs research by constantly raising new questions, and it has become the central organizing principle of modern biology, providing a unifying explanation for the diversity of life on Earth.

• http://en.wikipedia.org/wiki/Evolution
• http://www.talkorigins.org/faqs/comdesc/

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Music: "Operation Evolution" by Dimrain47
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[dkthg]

IT'S A FACT BITCH!

[justcallmesolo]

Pithecanthropus erectus & Evolution have one thing in common, WHICH IS FAILURE.

[mancno1]

@clanowar There not a different species. Your either trolling or are a complete moron.

[dmoney69696969]

@clanowar That's retarded.

[clanowar]

so, im not a racist, im just a scientist? blacks and chinks are infact just a diff. speicies and i can keep one in my garden and walk him with my dog? ok... :P

[RolandMaurer]

@Lulu4Him - I'm sorry to say, but you are simply wrong. Maybe you could try and get educated, read some good biology textbooks? You know, books by... scientists. Not ignorant loonies who have "opinions" about evolution. I have been discussing evolution with creationists over the internet for more than a year. None of them ever brought up anything remotely sounding like an intelligent, educated argument. Will you be the first one to succeed, or will I just laugh my head off like every other time?

[Lulu4Him]

I can give you evolution in one second: FAIL! And there you have it.

Anybody who wants to believe this lie, wants to have a good excuse to not believe in a Creator, God Almighty, but would rather believe in a false theory that is astronomically at odds against truth. In other words, it takes billions/trillions times more faith to believe in evolution than creation.. "Evilution" is not only flat out wrong, but is completely impossible.. Please watch Walter Veith's evolution videos..

[BashirsMomma]

Can the music be turned down? It is hard to follow with the background music.

[Albalrogue]

@FutureLaugh So there you it, evidence.

[FutureLaugh]

@Albalrogue with evidence of the same murder by the murderer