In India there are millions of middle and lower middle class people who are working hard but denied opportunity and dignity of life due to reason galore. Mostly these sections of people are hell bent on moving out cause they see the luxurious life style of high & mighty in India which is ...
Humans rely on sunlight to generate vitamin D. As humans migrated north, they recieved less sunlight; therefore, natural selection favored lighter skin that produced more vitamin D in response to sunlight. Sickle-Cell Disease Sickle cells The gene for this disease is prevalent in Sub-Saharan Afric...