Recall that during the paleozoic era, atmospheric co2 levels decreased. Why?.

its like this, "if i give a plant an unlimited amount of sunlight,then the plant will grow to its largest possible size."

hope it let me know if it does or doesn't =^-^=

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

the answer is d p: cell, q: organ, r: organ system, s: tissue