How does natural selection result in the evolution of new species ,according to DARWIN ?? include an EXAMPLE?

Question

if u know thisits prettty hard question

Answer 1

Natural selection works upon the basis that only those organisms with traits that are favorable to the environment in which they live will be able to survive long enough to produce offspring.

An example might be if a given place switches from a very wet environment, such as a rain forest, to a very dry one over time, such as a desert. Those plants, animals, etc, that have traits and characteristics which allow them to adapt to the environment as it gets dryer and dryer (say over 2 million years), will survive long enough to produce offspring. Those animals that do not have traits that allow them to adapt will die and not be able to produce offspring.

In essence, the change of environment from a wet to dry one creates a situation where organisms that are adapted for a dry environment are "selected for" and can have offspring. Those that cannot are "selected against" and cannot reproduce.

However, where a new species arises is when an organism diverges so far in characteristics from the original ancestor. Think of the dry environment change as a funnel. All plants, animals, etc with features that work well and allow them to live in a dry environment, like a camel, live on. With each new generation, those individuals with features, such as a bigger and bigger hump to store water will be "selected for" and be able to live long enough to reproduce.

However, when the environment was a wet rain forest, the camels original ancestor might have looked like a horse!

Remember all of this occurs over millions and millions of years. The process is slow and gradual.

And don't let those Creationists bog you down!!!!!

Answer 2

Natural selection is the process by which favorable traits that are heritable become more common in successive generations of a population of reproducing organisms, and unfavorable traits that are heritable become less common. Natural selection acts on the phenotype, or the observable characteristics of an organism, such that individuals with favorable phenotypes are more likely to survive and reproduce than those with less favorable phenotypes. If these phenotypes have a genetic basis, then the genotype associated with the favorable phenotype will increase in frequency in the next generation. Over time, this process can result in adaptations that specialize organisms for particular ecological niches and may eventually result in the emergence of new species.

In other words, those individuals in the population which possess the necessary adaptations that enabled them to survive (or "survival of the fittest") will live on to reproduce, hence passing on their genes to their offspring... this goes on for many generations. An example for this is Darwin's finches when he was studying them in the Galapagos island, these finches are an example of adaptive radiation, a form of natural selection.

Answer 3

Natural selection is the mechanism for evolution. Species is normally defined as two organisms that are similar and can mate with each other to produce viable offspring. Now, let us say we have a species of bird that gets mutated so that there are two types of beaks a large beak and small beak. The large beaked birds move closer to the shore as the catch fish with their large beaks. The small birds move farther inland and feed on nuts and berries. This causes the small beaked birds to be separated from the large beaked birds for a long time. As time progress the different beaked birds mutate and adapt to their new surroundings. Until they are too different that if mated the cannot produce a viable offspring.

Answer 4

Evolution is a philosophy. Darwin invented the philosophy without a shred of evidence.

All these people who answered your question above me and below me have little or no common sense. They want to believe something that does not exist and use multiple excuses to answer all the contradictions.

According to evolutionists we are the results of gene mutations. If that is so why don’t we see any evidence of failed gene mutations? If we come from monkeys why don’t we see monkeys that are half human? Some want to say so reason is because it happened millions of years ago; however, there are no fossils that support the theory. We should find millions of fossils of half human half monkey according to their theory.

Evolutionist want to claim that since we see some primates using sticks to dig for worms and other food as proof that primates are adapting to human technology. They however fail to mention that other animals use tools too, such as the California Sea otter that uses a rock against its chest as a tool to break abalones. The fact is that no creatures are climbing the evolution ladder.

When asked for evidence from the past they say it happed to fast to leave fossil evidence. When asked for evidenced from the future they say its happening to gradual to see evidence. The evolutionist look for excuses not answers.

I have another question for evolutionist. An egg, one of the most marvelous creations on this planet is just strong enough to last thru labor and weak enough for the embryo to break itself out. Is this a simple accident? Gene mutations? It is never too hard or too soft? Some evolutionists try to claim that it is the survival of the fittest that allowed the creation of today’s wondrous world. It is difficult for anyone who has any logic to believe that by chance everything came together at the same time. All eggs of all species managed to come together and figure out, how produce (by accident) and to ovulate at the same time.

Will you believe that a million monkeys jumping on typewriter will ever produce a single logical sentence? Will you believe that millions of buckets of paint spilled all over canvases will ever product a painting? Will you believe that a million hurricanes will ever manage to put together a building? If you answer yes, you are crazy. If you answer, no than how is it possible that an accident caused the great wonder that is this planet and universe? This planet is trillions of times more intricate and beautiful than any building, painting or anything any human has ever built or invented. Can you actually believe this was created by gene mutations, natural selection, or by accident?