The hydrogen used to produce ATP in the light reactions of photosynthesis comes from ___. a. Splitting water
b. Carbon fixation
c. Movement of hydrogen ions through the membrane
d. The burning of sugar molecules

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus