Why is the government secretive and always want to do something to the world/control people?

Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from