Evolution is the biological context, the process by which organisms change over extremely long time periods.
From generation to generation.
As an example of evolutionary forces, I take the beaver.
Today's bävrars grandfather, grandfather, grandpa, grandpa, grandpa, grandpa, grandpa ... etc..
(Thousands of beaver generations anyway) Today beavers do not look exactly like beavers for hundred thousand years ago.
The differences are perhaps not so great but maybe it was beaver teeth, less tail or less.
It is difficult to know the difference.
But going even further back, a million years maybe, then you could probably find even greater differences.
But why is it so? Animals and plants change over extremely long periods of time? The answer is simply that it is easier to survive. Beaver needs more teeth to help get food, the tail gets bigger because it will be faster to swim. One can find many examples in which organisms have evolved into something that can do much better its current environmental surroundings. So it is for the most part the environment around the individual that influence how it develops. If an animal comes out well and never threatened as it does not evolve so much. Take a crocodile, for example: the crocodile for 1 billion years ago look almost exactly like today's crocodiles. The only difference is that it has reduced drastically in size, but only because its food (mostly dinosaurs) for a long time ago was not enough. The dinosaurs died out and the crocodiles had to live on smaller creatures, also died in a huge number of competitors when it comes to acquire meat and crocodiles were almost a monopoly in the market. From that time until today, you can almost say that the crocodile animals have been and drop, or something like that anyway. The only real threat of the crocodiles have ever had have come in recent years - from us, man. While I come into the man I guess I can talk a bit about henne.Med our incredible ability to think, nothing has managed to get us to stay. It's almost proud of being human. From the beginning we were monkeys hanging from trees and ate bananas and other edible things that we could find. After the hand (or foot), we developed the transient creatures and we learned to save more on energy, alerts. Even further into the future has hjärnintelligensen increased and we used simple tools, like spears. We lived as hunters and gatherers and one day there was some wacko who dug down a few seeds of some legumes, and came back after a few months. Snap Cuckoo saw that it had grown up somewhat on the exact spot where he buried the seeds, he realized with his amazing brain intelligence that there must be a connection. Today we have crazy cuckoo to thank that we live as we live, so let instead call him a wise brownie. One important thing to mention is that the discovery that one can cultivate the land has to evolution to do, however, is the result of evolution.
How many times have you not seen a picture of a hairy ape walking on all four legs and the next stage, he walks upright but with a little less hair?
The phase after that picture, he is still a little more developed, and finally he stands up and represents today's man (with a rake in his hand?) I am sure that everyone has seen it and therefore I produce a more humorous example.
Charles Darwin, we have probably all heard of. He lived long ago (not really for 30 billion years ago, but 150 years ago) It was he who began to suspect that all animals and creatures have evolved from a single organism. He did one day when he was with the ship arrived in one of his strange island, he found the unseen creatures and plants. But what fascinated him most was a certain number of birds. There was no birds on those islands that saw was exactly identical to the difference from the bill. Näbbarn was in fact very different. Some of the nearly identical birds had a large and strong beak, while some had a small, thin beak. They had adapted to their living conditions.
Darwin began to suspect that the birds had originally descended from a single bird, but that they had developed over the length of time. He thought that if these birds really came from the same individual, then it's not entirely impossible that every single bird had originally evolved from a single bird. His ideas spread, and one can understand how it unfolds. It was Charles Darwin who founded the theory of evolution, the one we currently believe.
I have a hypothesis about how birds evolved. It reads as follows. Lizards lived near a hill, not steep but steep precipice. It is a ödlerik place and they're both above and below the mountain. When it's time for mating and looking up lizards other lizards and spreads because it is not going to be inbred. Some of the lizards come to the steep mountain side and makes his way down. Once down after the long and energy consuming climbing finds the other lizards to breed with. They back up the mountain after a very long and hard climbing. This happens every year. Ten thousand years later, they have developed lightweight, flat cells. They stand on the cliff edge and throwing themselves out, they glide a few feet and jump all the time on the way down the mountain. One hundred thousand years later, it has developed small protrusions things on lizards, wings. They can glide all the way down. When one hundred thousand years have passed again, the wings become large enough to glide more kilometers. The small flaps its wings to more easily determine where to land. The little detail to flap their wings, many years later gave rise to what were then the birds can lift themselves but to throw himself from the bottom one. The spreading rapidly around the world and adapted to the surrounding environment. Evolution is behind everything.
When a body is changing, thanks to evolution, it depends on two things: improving the body or changing a body's functions.
eye, an early stage of the eye for several billion years ago was that the eye perceives light and the organism was able to take advantage of this.
The eye specialist and eventually became today's eyes.
One should not forget that only animals that evolution served, there are plants, too. Why are some thorny bushes? Well, of course, to do better against all "buskätare"
Today people need hardly developed, but who knows? About one hundred thousand years when we live in space, our earphones are twice as large. Today we might have only half-way when it comes to our minds? Perhaps we as good vision as some animals? But probably not true that because we can hardly survive more easily by hearing and seeing better.
Evolution can be compared to whisper the deck. Twenty children sit in a circle, a child decides a word, she determines the word "cloud formation". The child whispers it to the next child who in turn pass it on to the next child. When the last child, finally says what he heard might be the word "boy's confirmation." The word has evolved. Certainly not to survive in the wild or to escape the carnivores, but that the children were wrong. A mistake.
David Cassidybased on 8 ratings Evolutionary forces,