How could heavily fertilized lawns contribute to cyanobacterial blooms in lakes and oceans? a. run-off from the lawns will get into the water system, leading to large amounts of nitrogen that can be used by cyanobacteria in water systems. b. the large amounts of nutrient-rich grass that are created will be mowed down, with grass clipping bits eventually washing into sewer systems and into larger bodies of water. these grass clippings will serve as a nutrient source for cyanobacteria, leading to blooms. c. large amounts of fertilizer will lead to excessive production of greenhouse gases (like co2) from grass in lawns. excessive co2 production will lead to large blooms of cyanobacteria in water systems. d. they won't-the two systems are completely unrelated. how could grass in lawns contribute to effects in lakes and oceans?

On a backpacking trip, kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 calories. at the school track, janelle runs the 100-meter sprint in 13.5 seconds, burning 10 calories. afterward, janelle’s leg muscles are aching and she is breathing hard, while kenny maintains normal breathing all day, even though he burns 400 times more calories than janelle. which two statements offer the best explanation for this phenomenon? a. if the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt." b. aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting "oxygen debt." c. after about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce atp, resulting in "oxygen debt." d. the rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.