Which component of blood provides the mechanism for transportation of cells and nutrients?

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

Write the balanced chemical equation forphotosynthesis.

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?