what is charles darwins theorie and what are some facts for it?

Question

i want to know his theorie too and tell facts that prove it ok.

Answer 1

Ahh...Charles Darwin.
If you are interested in Darwin, definitely read The Origin of Species. It's all about his theory, and you will be an expert.

In a nutshell, Charles Darwin developed the idea of "natural selection" through studying the life on the Galapagos islands. The islands are very isolated, and the species there must have evolved from other species that live on mainlands. The birds that inhabit the island in particular are hypothesized to have come from birds that got caught in a windstorm and ended up on the island. When animals reproduce, sometimes their offspring experience mutations, for example, a finch is born with a bigger beak than its sisters. Maybe the finch's beack makes it easier for that bird to crack the shells of seeds and nuts that the bird eats in order to survive, and it is therefore more likely to be healthy and mate and make baby finches. If the "big beak" quality is hereditary, that is, the finch's babies will also have big beack, and will also survive, over many millions of years, some finches will evolve to have bigger beaks, creating a new species of finch!
The main points are that 1. Mutation is possible, 2. some mutations are heritable and 3. mutations that make an organism more likely to reproduce are more likely to be passed on to future generations 4. ultimately, over time, species will change.
Natural Selection means that because of positive or negative traits (ie, big beaks or weak wings) nature will "choose" which organisms survive.

Answer 2

Darwin's theory is about the development of a species from an ancestor species, descending with modification. He theorized that animals such as Dogs evolved from Wolfs who in turn diverged from another ancestor species further down the lineage.

The central theme of evolution is that there is a variation in a population, a means of introducing variations to a central population, a means of selecting the fittest variations and a means of transmitting these changes down lineages.

For instance, in a population of Wolfs, there are variations in their base features that arose by random mutation to the original body plan. These changes reasoned Darwin, produced differences in the central gene pool. The most successful variations were transmitted down lineages to descendent populations. As an example of variation, the color of the fur, and the ability of the to evade predators: Wolfs that are camoflaged and evasive become more successful then those who are not as well camoflage or evasive.

Speciation occurs when a population of Wolfs is isolated from the central population, where there is no means by which to transmit the newly arising mutations to the parent population. Therefore the newly isolated population acts as a newly risen gene pool. Over time, the species diverges from the parent species and become Dogs.

As no transgenetic material flowed between the parent population and the isolated population, changes accumulated due to the mutations and selections acting on the populations asymetricly.

The parent Wolf population could have had selection presures such as toughness, ability to withstand cold weather, sharper fangs and so on, while the isolated Wolf population could have had selection presures such as being man's friend.

These pressures would have acted as the gene reaper that lowered the number of offspring had by unsuccessful animals, while increasing the number of offspring had by the more successful animals. Over time, the number of successful genes would be more frequent in the gene pool, while the frequency of unsuccessful genes would be reduced.

Animals not equiped with the right genes would die out due to the inabillity of the animal to cope with the selection pressures. Dogs that did not take to their masters would have eventually died off while those that fawned upon them would have been bread into descendence. Likewise, Wolfs would have had similar fates, those not having sharp fangs dying off while those with them lived on.

The quantifying quality of the Wolf/Dog evolution is that both evolutions are concurrent, being that both parent and diverged populations evolve at the same time. A dead end evolution is one where the parent population dies off or goes extinct when in competition with the newly risen divergent.

Answer 3

Natural selection and survival of the fittest, as previous respondents mentioned.

Both are based on the fact that those individuals best able to survive are the most likely to reproduce.

Proof of the theories is everywhere. The tremendous number of species of animals on earth (over 1 million kinds of insects alone) provides some proof, as each specific species has adapted to a specific set of conditions.

Even ancient man knew about natural selection (even if he didn't know what it was called). Early agriculturalists learned how to cross-breed different plant varieties to produce ever better food crops. Early "ranchers" learned how to breed animals with certain characteristics in order to enhance those characteristics.

Answer 4

It is a very deep and rich theory. Simplified it is evolution overtime through natural selection.

Browse the website below for all the details.

Answer 5

Survival of the fittest. Species that cannot adapt decay and disappear. Dinosaurs were the masters for millions of years, until scarcity of food led them to extinction. Small reptiles evolved into amphibians and mammals and have survived ever since.

Answer 6

aaah Charles Darwin's theorie in which I am an expert. Charles Darwin's theorie states that all life on earth started from single celled organisms which eventually dispersed into worms which evolved into fish and went on to go from amphibians toreptiles to bird and mammals which evolved into lemurs which evolved to monkeys to apes to bipeds to the classic homosapians

Answer 7

I loved the "big beak theory"! Is it any relation to the "big bang theory"?

Answer 8

we are the world we are the children. Of apes,and chimps and fish and cells. Come on everybody sing

Answer 9

Also this web site.

http://www.talkorigins.org