Carotenoids are organic pigments that are found in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms, including some bacteria and some fungi. Carotenoids can be produced from fats and other basic organic metabolic building blocks by all these organisms.
   Senegal is a republic with a presidency; the president is elected  every five years as of 2001, previously being seven years, by adult  â¦ voters.
Senegal retained the green-yellow-red flag but substituted a green star for the kanaga. Green is seen as a symbol of hope and of the countryâs major religions, while yellow is for natural riches and the wealth derived from labour. Red recalls the independence struggle, life, and socialism.