Which mechanism requires energy?
a. diffusion of oxygen into a red blood cell
b. diffusion of ions through a potassium channel
c. osmosis
d. exocytosis

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

Me with these questions if you’re it sure don’t answer

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?