Bio 1500 Mizzou Schul TEST 4 Exam
Questions And Correct Answers.
Residual lung volume - answer✔✔amount of air left in the lungs after exhaling
Explain why residual lung volume exists - answer✔✔keep the alveoli open even after maximum
expiration which allows for continual gas exchange to occur between breaths.
Explain how the circular processes of photosynthesis and cellular respiration result in the cycling
of carbon within ecosystems. - answer✔✔CR produces CO2 and water which PS uses to make
O2 and glucose which CR uses
Explain the two reasons for an imbalance in this cycle that led to the increased O2 during the
Carboniferous. - answer✔✔1. Increase in photosynthesis
2. Burial of carbon- removed from the cycle
Describe the hypothesized reasons for the decline in O2 during the late Permian -
answer✔✔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
Explain the importance of Lignin on the rise and fall of O2 levels during the Carboniferous -
answer✔✔Lignin allows coal formation and allows excess O2 to stay in the atmosphere
Explain the importance of Lignin Decomposition on the rise and fall of O2 levels during the
Carboniferous - answer✔✔Lignin Decop did not allow coal formation and did not allow excess
O2 to stay in the atmosphere which increased PS
Recall the general function that gradients have in cells. - answer✔✔storage
Explain how gradients are used in cells using the example of ATP Synthase - answer✔✔stores
H+ and pushed inward which provides energy for ATP synthase
Molecular level of biological organization - answer✔✔involving structure/behavior of molecules
Cellular level of biological organization - answer✔✔processes performed by cells
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