Evoulution and how it works?

Question

I dont understand it that well, for example, how did the giraffes get longer necks and how do thy horses get hooves and not stay fingers, even if they were using them. the more awnsers the betterr. please help

Answer 1

Here is a brief answer. Giraffes got longer necks through evolution because of survival of the fittest. What would happen (and this is true for other creatures) is the giraffes with the longest necks would outlive the ones with shorter necks because they were able to get more food. So therefore, they produced more offspring, which in turn had long necks. So, over time they became dominant and the ones with shorter necks were eventually weeded out.
This is very brief and if you would like more info I would be happy to give it.

Answer 2

Supposedly, the evolution works mainly by two means. Survival of the fittest and genetic inheritance within the same species.

It was believed by evolutionists that every specie would get some genetic advantages and disadvantages from its forebearings. Those ones who survived are the ones preserved the advantages and lost disadvantages. For example, the giraffes with long necks will get neutrious leaves in their living environment and their offsprings would have longer and longer legs if their living environment does not change. Other explanations are along the similar lines for other animals.

Answer 3

Evolution means gradual change.

There are several processes at work. There is existing variation in the population. At first longer necks are a survival advantage, so all the features that favor longer necks than to accrue in the population over generations. Rarely, a novel variation (mutation) will arise giving an additional advantage in the form of an even longer neck.

Similarly, hooves started as toes, but those who ran on one toe with a thickened nail gained an advantage. Eventually, the other toes became a liability, and those in which they were smaller were less likely to injure a body part that gave them no advantage.

Answer 4

Product of their environments. The theory of evolution is based upon that something must live, something must die, and something must reproduce. An organisms that die are usually the one that can not survive in the environment while the other organisms that survive can and pass on the trait that helps them survive to the offspring. I'm not sure of the idea of a horse having fingers. Id research and see what are the ancestors of horses