How did each race evolve to suit their surroundings?
474523
There are some great maps out there correlating skin tone with a modeled optimum at each geographic point.  That optimum is based on balancing the need to avoid burning and skin cancer against the need to obtain UV light for creation of vitamin D.  \n\nOther adaptations relate to features of the environment.  Northern Europeans, Inuit, and Eskimo people have a distribution of fat on their bodies that is optimized for heat retention.  The body shape of a Masai, for example, would be less than optimal near the North Pole.\n\nThere is a hypothesis that many traits are associated with sexual selection or may pertain to the tradeoff between sexual selection and aspects of the environment.  The distribution of fat tissue, particularly in women, in different races has been proposed as correlated with cultural differences in male preference as well as with adaptaion to the local environment.\n\nFinally, there is the feature of accident.  The epicanthal fold of many East Asians might have been beneficial to many Caucasians, but perhaps by chance the feature simply wasn't present in founding populations in Europe.  Characteristics in founding population and gained or lost by chance certainly play a big role in differences in humans from different geographic areas.  Not everythig is adaptive.\n\nBear in mind that this is not based on fixed differences among populations or races of humans, but instead on gene frequency in different populations.  For example, Swedes are lighter in skin color than the Ndebele not because each population has distinct genes, but because those genes differ in frequency.  Among all the loci that contribute to skin color, Swedish populations have very few alleles that code for dark skin.  Each individual Swede will therefore have only a few dark loci where dark alleles are present whereas most loci will have light alleles.  The Ndebele populations and individuals would act in reverse.
437855
Maybe the "survival of the fittest"-rule doesn't count for every little detail in the genetic code. Is this possible?\n\nMaybe there was no particular function for this. Maybe the forefathers of asians and caucasians where quite simply different looking, one moved west the other east. They had no more contact and so each developed into a distinct race, with their own features.\n\nI don't know, i'm neither a biologist, nor a historian, nor anything else. \nIntriguing question. congratulations.
795179
First of all, racism is based on emotion, hatred, and all those other Anthropomorphic behaviours.\n\nIt is believed that the first humanoid creatures on the planet evolved in Africa, then through subsequent migrations to different regions of the globe, they changed in response to their environment.\n\nNo where is it written that things evolve into higher life forms.... that is theory that tries to explain things like the movement onto land from sea, etc. Things dont just change into something else, they are modified to better suit their environment, look at insects for example. Most insects had to develop wings in order to reach their food, this is because tree were appearing, and the fact thta tree were appearing is based in inter and intra specific competition for sunlight....in other words things change to benefit themselves. They dont becom an entirely different thing. We are essentially apes, just our brains are larger, this is related to diet, and to behaviour, we stand up right more often simply becasue we evolved to carry objects, we have less hair because natural selection ade us that way, we cant grip branches with our feet, becasue we preferred to run and walk than to climb. Things like the aids virus is constantly changing and "evolving", it doesn't become an elephant overnight, but its physiology changes just enough regularly to make it very difficult to combat It does this in resonse to host physiology, and all other sorts of environmental conditions.\nThe differences in the human population are related more to the time when their behaviours changed from nomadic hunters to sedentary farmers. If you look at Blacks, they are generally faster, taller, can jump higher, have a longer reach and are in better ohysical condition.....not becasue they were meant to play basketball, but because Africa was slower to develop other means of surviving than lets say Europe, who turned to medicine and discovery way before Africans did. Many tribes that still exist today still carry on very old means of hunting and gathering, and due to this they are much more suited for it, some caucasian person would simply not be able to cut it without modern technology....\nso as I said earlier, it is all related to environment, and the changes thta are necessary for survival that dictate what we look like and how we behave.
99484
What an odd question. They come from variations of a dog-like species that evolved. What exactly are you asking?
266328
Hey try this site from the BBC. It might be a little too in depth for you but the first page is a good introduction and page 5 gives a good example on how horses have evolved.\n\nhttp://www.bbc.co.uk/schools/gcsebitesize/biology/variationandinheritance/3evolutionrev2.shtml
110739
They have adapted to their environment.
64641
Animals and plants develope unique features that help them to adapt to their enviroment.
351989
you basically want to say which species evolved first.\n\nTry this website...it might give you some ideas\n\nhttp://en.wikipedia.org/wiki/Phylogenetic_tree
1126468
thier unique adaptations..bacuse they dont ahve a long neck..god gave thema long trunk..
906616
The world is a beautiful patch work. Different races means different cultures, background, languages, histories, etc. That is fun to learn, experience and get to know. Teach us to be understanding, tolerant and help us grow as human beings... at least in theory.
1029709
They form the human race. \nst
1116290
DNA changes over a long period of time by different factors such as the temperature. For example, During the ice age, the organisms have tough skin, heavy fur to keep their body temperature warm. Then the earth warmed up so the these organisms no longer need the heavy fur to keep warm. Their children's children began to evolve to have less fur in order to not die of heat. The organism changes when its surroundings/environment change. Evolution is needed for the organisms to adapt and survive to the current living conditions presented upon them.
727845
Why do humans have different races? If they arent meant to co-exist than their should be one race of humans since we all evolved due to the enviroment they were inhabiting.
497677
Well, scientically it would be attributed to evoltion and how each evolved,\n\nhowever the answer may lay in the concept of the soul, or whatever is in control of the brain.
840176
Pretty simple actually.  The original man and woman had great complexity in their genes.  When God made different languages at the tower of Babel, this divided people into groups- thus splitting the gene pool.  Different features survived better in different climates.  For example, in a hot, sunny climate people with dark skin absorbed less ultraviolet light, but people with fair skin got too much.  They either got various diseases and died, or moved to an area with shorter days.  That's just one example.  The differences that we see (skin color, hair type, etc.) is a small fraction of all the things the different "races" have in common.  There is actually only one race- the human race.  \nSkin color is what people tend to focus on the most.  But we actually all have the same skin color, caused by the pigment melanin, we just have different amounts of it. And how much is determined by genetics.  \nActs 17:26 says "and He made from one blood, every nation of mankind to live on all the face of the earth, having determined their appointed times, and the boundaries of their habitation..."\nIt's just simple genetics.  And look what we've done with it.
520493
Black people are generally taller, with longer legs, a leaner body frame, and larger nostrils for breathing in more air.  These are environmental adaptations from eons of living in Africa.  A lot of those features are still there today.  These features allow them to run faster than Whites.  Is this true for all? NO. Just a generalization of supported scientific facts.\n\nAs forthe three point shots, well, that's just opinion.
20516
First of all, how do you really define "race"? You could divide people into a few huge categories, or many smaller ones. Still, genetically, there's really not as much difference between individuals as you might think.\n\nSecondly, in the future (presuming that humanity will survive another 30,000 years may be a mistake), the "racial boundries" will have shifted due to travel and other factors. Groups of people that we currently lump together could be split apart (or vice versa), and "new" races will be created.\n\nThere is always the question of whether the concept of "race" will exist in the future. But that's another post...