Answer each of the following questions in one complete paragraph each. Your document should contain at least 350 words. Support your answers with research.
Protected Lands

Why, or under what circumstances, might it be hard to establish a large area of protected land?
How can habitat corridors be beneficial to species that need large areas in which to live and move around?
What are two benefits provided by protected lands such as national parks?
How could buffer zones help mitigate the problems of overcrowding, development, pollution, and invasive species in national parks?
Tourism for wildlife viewing and outdoor recreation can be a welcome source of income for many developing countries. This is sometimes referred to as ecotourism. Make a list of three things you think a country's government should do in order to make sure that ecotourism does not do more harm than good.

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.