Bio 1500 -Schul -Test 4 Questions with
Complete Solutions.
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 photosynthesis2. 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 energy 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
Recall 2 more examples how gradients in cells are used to do work - Answer diffusion, atp
synthase
Cellular level of biological organization - Answer processes performed by cells
Organismal level of biological organization - Answer physiology of plants, animals, ... - how
do they work
Ecological level of biological organization - Answer interactions between organisms and
environment
Complete Solutions.
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 photosynthesis2. 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 energy 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
Recall 2 more examples how gradients in cells are used to do work - Answer diffusion, atp
synthase
Cellular level of biological organization - Answer processes performed by cells
Organismal level of biological organization - Answer physiology of plants, animals, ... - how
do they work
Ecological level of biological organization - Answer interactions between organisms and
environment
