In electrophilic aromatic substitution reactions, a -CO2H substituent on the aromatic ring is:

a. a deactivator and an o, p-director.
b. an activator and a m-director.
c. a deactivator and a m-director.
d. an activator and an o, p-director.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.