The worst groundwater recharge zones have
a. low permeability and low porosity
b. low permeability and high porosity
c. high permeability and low porosity
d. high permeability and high porosity

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.