Why have humans evolved to have different skin colours and different racial features?

Question

Why have humans evolved to have different skin colours and different racial features?

Answer 1

so people have the opportunity to be racist

Answer 2

JUST TO MAKE THINGS CLEAR: anit-evolutionists believe in blind faith- that may or may not be true. god does most likely exist.

to answer the question:

this is due to the migrational factors inwhich the (i love this) the money people had to take- the colder the enviroment the lighter the skin colour needed to be the hotter the enviroment the darker the skin.

facial features such as thins noses came about due to the weather being colder thus inorder to stop the person from getting to cold when breathing( lossing heat) the nasil cavity got smaller and more efficient. The more larger and broader nose came about as for the temperature was warm enough to allow for more air to be breathed in without worring abou getting or being effected by the process of inhalation.

scientific reasonings are the  theory below: human skin color has evolved to be dark enough to prevent sunlight from destroying the nutrient folate, but light enough to foster the production of vitamin D  or

We lost body hair to cool our growing brains. Our pink skin and folate levels were in danger of UV radiation, so we evolved lots of melanin and became dark skinned. But some humans traveled to areas where there wasn’t as much sunlight, thus they were required to evolve lighter skin

Answer 3

Differences in skin color is a manifestation of Gloger's Rule in humans.

According to Gloger's Rule, birds and mammals (including humans) have darker colored plumage, fur or skin color the closer they are to the equator.

As for evolutionary drives: lighter skin encourages the synthesis of Vitamin D, whereas darker skin protects against UV radiation.

Areas near the equator experiences longer periods of sunlight than areas away from the equator, thus areas away from the equator tend to have lighter colored animals, and areas near the equator tend to have darker colored animals.

Differences in physical size are a manifestation of Allen's Rule. (Size vs heat loss/retention)

Non-adaptive traits are most likely an example of the Founder Effect of early humans.

Answer 4

This isn't entirely known. There are, among many people, a correlation between skin color and proximity to the equator, but that doesn't hold everywhere.

I also have read some hypothesize that different skin colors may have been at least party due to sexual selection, "fad" in a way. So, if, in a parciular society, women start finding darker men hot, they'll more likely choose them as mates, and over time, the group will become darker.

And there is a benefit to having more pigment when one is near the equator, and a benefit to having less where there's less sun.

As for other features, it might be accident more than anything.

Answer 5

You are obviously colour prejudiced yourself when you use the word racial so unnecessarily.  Either that or you should go back to further education and sort out your grammar.

Answer 6

With regard to skin colour, people have evolved that way to suit the environmental conditions they live in.  Black people produce more melanin than white people because it protects them from the suns rays in the hot countries in which they live.  I don't really know about facial features, probably just genetic.

Answer 7

Where the sun is hotest ,you have dark and black people

Different parts of the world will bring forth different colour's.

If you stay in jail,away from the sun,you will become pale

skin.

Also Different work and different involvement's can cause

changes to the feature's.How much you eat can change

your feature's.Pumping iorn can make body change's.

Depends on your involvement.

Did that help?

Answer 8

humans never did evolve...it was a pile of rubbish created by a man called Charles Darwin who himself says at the beginning of his book "the origin of species" that there is no proof of his theories and they are merely his point of view...it was just given to much publicity...same way einstien was givin too much publicity at a time where people wanted answers and would believe anythin (as long as it excludes god).  we live in a time where some believe in a operant "big bang" creating this world in its beautiful orchestration and that no one wants to believe in the creation of human. but rather believe we came from apes...what a joke...apes are still here...they havn't evolved!  evolution of man is a racist derogatory matter where natural selection concludes that white is the purest form and the blacks are the beast like creatures that don't have sufficient mental capabilities as to those of white skin. do ur reserch into 'eugenics' and how they describe the skin colour and facial features, careful u mite get disturbed. but eugenics branched from "darwism"( that Charles Darwin dude i mentioned before) it seeped its way true into n**i Germany...the germans eugenics program ran under the banner 'racial hygiene' opting for a purer human. anyway in todays day it is disguised as rerpogenetics and the creation of designer babies as well as Genetic screening, Birth control, Promoting differential birth rates, Marriage restrictions, Segregation (both racial segregation as well as segregation of the mentally ill from the normal), Compulsory sterilization, Forced abortions, or, conversely, forced pregnancies and Genocide.

anyway you can either believe in Darwin's natural selection and evolution of man from a ape or believe in gods creation of humans.

Answer 9

It is thought that most physical features are a result of climate.  Skin color is in response to the amount of sunlight during the year.  African noses are short and wide to cool air; European noses are long and thin to warm air.  Body hair is protection from cold and is generally sparse in peoples native to tropical zones.  

Pick almost any physical feature of a people and it can probably be, in some way, connected to climate adaptation.

Answer 10

It is to do with the climate of each part of the world.

Alonzo should know that Man has not evolved from the same apes you see today. The fact is that Man and today's apes have evolved from a common ancestor.

Answer 11

While many features that vary in human populations tend group themselves by geographic location, the question of exactly why all these difference arose isn't well answered. Once the human populations were isolated in their areas, genetic changes were going to start accumulating, there's no doubt about that. It's hard to say with any certainty why some groups tend to have more hair in certain areas, or why some people have drier earwax than others, or why skin colors tend to vary. There are indicators - melanin content often varies with annual sunlight - but there are very, very few good rules to go by.

We know a lot of the correlating factors. Plenty of them are listed above. But actual relationships are hard to prove.

Answer 12

To suit the environment they evolved in. Also, immune systems also adapted in the same way. Oriental eyed developed because the sun was always lower in the sky in that part of the world.