Infer why colonial organisms that lived grouped together might have been one ofvthe first steps toward multicellular organisms in the course of evolution.

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into