Which of the following are the starting substances in photosynthesis? a. glucose and oxygen. b. glucose and carbon dioxide. c. water and oxygen. d. water and carbon dioxide.

for a different answer set the answer would be because the oxygen in the water had depleted (apex)

answerlength of time the medication is in contact with the skin(moistur level of the skin) depth of respirations blood supply to the area; all of the above; ///