In plants, the xanthophyll lutein is the most abundant carotenoid and its role in preventing age-related eye disease is currently under investigation. Lutein and the other carotenoid pigments found in mature leaves are often not obvious because of the masking presence of chlorophyll. When chlorophyll is not present, as in autumn foliage, the yellows and oranges of the carotenoids are predominant.
Government. Spain is a constitutional monarchy governed under the constitution of 1978. The hereditary monarch, who is the head of state, may ratify laws, dissolve the legislature, and propose candidates for the office of prime minister; he is also head of the armed forces.The prime minister (presidente) is the head of government. Spain: Government-Government Spain is a constitutional monarchy governed under the constitution of 1978.
The Kingdom of Spain is a vast and very populated country of the European Union, with more than 500,000 sq km and 46.1 million inhabitants according to the 2008 census. It has a population density of 88.6 people per sq km. Its GDP is at the average level of the 27 EU countries: 23,396 euro per capita in 2007. The administrative structure of the country is divided in 17 autonomous communities, distributed in 52 provinces.