Which is the rigid molecule composing plant cell walls? A. starch B. glycogen C. hemoglobin D. cellulose

Why is silver chloride is an ionic compound

How many moles of oxygen react with 12 moles of aluminum

Water is a highly important natural resource. which of these would be the best method to conserve water? a) drinking bottled water b) monitoring the ph of rivers c) treating and re-using wastewater d) testing nitrate levels in groundwater