It's the mitochondria, the "powerhouse of the cell".
There aren't any images to look at.
The answer is why ........
The answer to the biology question being presented above would be 'sexual reproduction'. Genetic variability is the most important result of sexual reproduction. In this variability, the genes are varied through sexual union and reproduction.
<span>Human skin color variations are primarily being determined by the type and amount of melanin pigment which is the skin.
The reason is the amount of melanin present, pigment present which determines the color of skin the more the melanin the more dark color they are.
Human skin color variation is likely evolved in response to differences in intensity of sunlight around the world. Reason being it has been developed because of different exposure of humans to the varied environment during migration. Human skin color variation evolved recently in hominid evolution.</span>
