Why do people have different skin colors?
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.
Does Worker Ants have two stomach ?
Worker ants, responsible for the feeding of the colony, have two stomachs.
The first is for its own food, and the other is where it stores food that it will regurgitate to feed its fellow ants.
What is ABC warfare?
In military context ABC warfare means atomic, biological and chemical warfare.
Nuclear, biological, chemical warfare are referred to as NBC, and chemical, biological, radiation and nuclear warfare known as CBRN.