A.
A-photosynthesis, B-transpiration

B.
A-transpiration, B-excretion

C.
A-respiration, B-photosynthesis

D.
A-excretion, B-respiration

A Aphotosynthesis Btranspiration B Atranspiration Bexcretion C Arespiration Bphotosynthesis D Aexcretion Brespiration class=