Photosynthesis and cellular respiration are considered complementary processes because O Glucose is produced in one process and used in another.
O Water is produced as a product in both processes.
produce excess ATP for the cell's use in maintaining homeostasis.
Both processes require oxygen gas as a reactant.

O Glucose is produced in one process and used in another.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.