bio 1500 test 4
1. Explain how the circular processes of photosynthesis and cellular respiration
result in the cycling of carbon within ecosystems.: increase in PS relative to CR will rise O2,
all carbon in organic molecules comes from products of PS, the carbon gets put back into air by being consumed by
animals/decomposers and release CO2
2. Explain the two reasons for an imbalance in this cycle that led to the increased
O2 during the Carboniferous.: 1. Increase in photosynthesis
2. Burial of carbon- removed from the cycle
3. Describe the hypothesized reasons for the decline in O2 during the late
Permian: Land masses form super-continent which led to a dryer climate and a reduction in photosynthesis which
led to the reduced burial of carbon and then O2 dropped as more carbon entered cellular respiration
4. Explain the importance of Lignin on the rise and fall of O2 levels during the
Carboniferous: Lignin allows coal formation and allows excess O2 to stay in the atmosphere
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, 5. Explain the importance of Lignin Decomposition on the rise and fall of O2
levels during the Carboniferous: Lignin Decop did not allow coal formation and did not allow excess
O2 to stay in the atmosphere which increased PS
6. Mt. Everest elevation: 8848 meters or 29,029 feet
7. death zone: The name for the elevation above 25,000 feet where the oxygen level is not longer suflcient to
sustain life for very long.
8. migration path of Bar Headed Geese: - fly from India to Mongolia over the Himalaya and reach a
peak height of 21,120 feet
- flight over Himalaya with little or no rest over 8 hours
9. functions of mammalian respiratory system: - Gas exchange in alveoli / breathing (take in
oxygen and expel carbon dioxide)
- Exchange of gas between bloodstream and body tissues
10. mammalian respiration steps: 1. Inhale air from the atmosphere
2. Diffusion of air to red blood cells in lungs
3. Oxygen is bound to blood pigments (hemoglobin) inside RBC
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1. Explain how the circular processes of photosynthesis and cellular respiration
result in the cycling of carbon within ecosystems.: increase in PS relative to CR will rise O2,
all carbon in organic molecules comes from products of PS, the carbon gets put back into air by being consumed by
animals/decomposers and release CO2
2. Explain the two reasons for an imbalance in this cycle that led to the increased
O2 during the Carboniferous.: 1. Increase in photosynthesis
2. Burial of carbon- removed from the cycle
3. Describe the hypothesized reasons for the decline in O2 during the late
Permian: Land masses form super-continent which led to a dryer climate and a reduction in photosynthesis which
led to the reduced burial of carbon and then O2 dropped as more carbon entered cellular respiration
4. Explain the importance of Lignin on the rise and fall of O2 levels during the
Carboniferous: Lignin allows coal formation and allows excess O2 to stay in the atmosphere
1/4
, 5. Explain the importance of Lignin Decomposition on the rise and fall of O2
levels during the Carboniferous: Lignin Decop did not allow coal formation and did not allow excess
O2 to stay in the atmosphere which increased PS
6. Mt. Everest elevation: 8848 meters or 29,029 feet
7. death zone: The name for the elevation above 25,000 feet where the oxygen level is not longer suflcient to
sustain life for very long.
8. migration path of Bar Headed Geese: - fly from India to Mongolia over the Himalaya and reach a
peak height of 21,120 feet
- flight over Himalaya with little or no rest over 8 hours
9. functions of mammalian respiratory system: - Gas exchange in alveoli / breathing (take in
oxygen and expel carbon dioxide)
- Exchange of gas between bloodstream and body tissues
10. mammalian respiration steps: 1. Inhale air from the atmosphere
2. Diffusion of air to red blood cells in lungs
3. Oxygen is bound to blood pigments (hemoglobin) inside RBC
2/4
