What are the ideas about natural selection by charles darwin?

Question

what are the ideas of charles darwin in natural selection

Answer 1

The short answer is those creatures, with traits that help them survive, will reproduce and pass their genes on.

"The Galápagos finches provide an excellent example of this process.  Among the birds that ended up in arid environments, the ones with beaks better suited for eating cactus got more food.  As a result, they were in better condition to mate.  Similarly, those with beak shapes that were better suited to getting nectar from flowers or eating hard seeds in other environments were at an advantage there.  In a very real sense, nature selected the best adapted varieties to survive and to reproduce."

http://anthro.palomar.edu/evolve/evolve_...



It's know that female birds will select males that have pretty feathers. Studies have shown that the males with the best feathers also are resistant to mites and other parasites. Hence, natural selection will produce birds with pretty feathers.

A good example of the process is found here:

http://evolution.berkeley.edu/evolibrary...

Answer 2

He believed that all life is descended from a common ancestor if you go back far enough.  Evolution of life is because of the gradual accumulation of change where every change would have to benefit or at least not harm the owner.  The most fit would be those that survived the struggle of life and gave birth to young that were able to produce the largest number of fit offspring.  Nature produced more offspring than could live and the struggle led to survival of the fittest and a gradual accumulation of beneficial traits that depended on the lifestyle and requirements of each organism.

Answer 3

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 4

Here they are very briefly:

Life started on this planet as one-celled organisms.  As they reproduced, they produced new and slightly different organisms.  Some of these new organisms did not survive very long because they couldn't adapt to their environments.  Other new organisms had features that made it easier for them to survive  (this process of extinction and survival is called natural selection).

As the process continued new, more complicated multicellular organisms developed.  Eventually this process produced the kinds of fish with big strong fins that were able to leave the ocean for awhile and walk on land.  In time, these organisms produced the animals we know today.  (Of course, plants evolved in a similar fashion.)

The physical evidence that this is true is now overwhelming.  We can even see evolution take place in real time as bacteria and viruses evolve to resist new antibiotics, for example.

Harleigh Kyson Jr.

Answer 5

The basic idea, and in a very few, very simple words, is "survival of the fittest". That means that the animal that adapts itself best to its surroundings will survive, and thus even create a new species.

Like, if to survive in a certain jungle a monkey needs long arms, the ones with short arms will die and the ones with long arms will survive and multiplicate.