From a global environmental standpoint, why should people in north america be concerned about rain forests in south america, asia, and africa?

Which sequence correctly shows the path of carbon dioxide during repiration?

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane