Effects of eutrophication: 1  The algae covers the surface, it prevents the penetration of sunlight into the wter bodies. 2  The growth of aquatic animals inside the water body is affected. 3  The fishes are not able to get good oxygen hence they die. 4  Usually it takes a very long time for the water body to regenerate its initial state. 5  The movement of ...
12 people found this useful.   The color of bone cell, a connective tissue, is a yellowish, and blackish when stained. The osteocytes, blood vessels, and haversian canals are a black color while the h â¦ aversian lamellae, and canaliculi are a yellowish color.at has a yellow color, so the appearance of the material in the medullary cavity â¦ will get more yellow as a person ages, but the marrow itself is red. == Bones are usually filled with a whitish cream colored marrow.
Skin Color Adaptation. Human skin color is quite variable around the world. It ranges from a very dark brown among some Africans, Australian Aborigines, and Melanesians to a near yellowish pink among some Northern Europeans. There are no people who actually have true black, white, red, or yellow skin. These are commonly used color terms that do not reflect biological reality. 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.