Both drugs had been previously recommended for approval 14-0 by members of FDA's Anti-Infective Drugs Advisory Committee. The significance of two new antibiotics in four weeks? We've recently been averaging one antibiotic every three years.
Skin color is due primarily to the presence of a pigment called melanin, which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin, which is red to yellow in color, and eumelanin, which is dark brown to black.
Brown hair and brown eyes are of indo-European origin, from white Europeans. Brown hair and eyes and olive-white skin tones were the first mutation to the white race. Africans â¦ and Asians have naturally black hair, black-colored eyes (no visible brown at all) and very dark or black skin tones.rown hair and eyes and olive-white skin tones were the first mutation to the white race. Africans â¦ and Asians have naturally black hair, black-colored eyes (no visible brown at all) and very dark or black skin tones.