BIOLOGY 1500: EXAM 1 QUESTIONS
AND ANSWERS
Recognize that all O2 on earth stems from biological processes. - ANSWER-
Recognize that the geology of earth has been dramatically changed by biology. -
ANSWER-from o2 fluctuations...
many minerals biogenic, made from o2
o2 in atmosphere - ANSWER-cyano- increased o2...
-green algae chloro. made more BUT o2 first went in to oxidation of minerals.. when
those were filled, o2 released in air and increased!! (especially from phytoplankton in
ocean)
Diffusion:
Describe the mechanism of diffusion at the level of single particles - ANSWER-
moves randomly, NEVER stops, unpredictable
Diffusion:
Describe the pattern observed due to diffusion at the level of many particles -
ANSWER-moves from areas of high concentration to areas of low concentration,
predictable, once it reaches equilibrium movement can not be predicted
Explain how the behavior of single particles explains the observed pattern at the
many-particles level - ANSWER-
Explain the relationship between distance and time during diffusion - ANSWER-
diffusion time increases with the square of the distance
[EXAMPLE] 2x distance equals....
4 fold time
[EXAMPLE] 10x distance equals....
100 fold time
diffusion works great within what types of cells? except for which cells? - ANSWER--
within cells that lengthen between 1-100 micrometers
-doesn't work good within axons
Recall the important consequence or limitations to organisms of using diffusion for
transport of molecules - ANSWER-
O2 levels in atomosphere - ANSWER-cyanobacteria and green algae chloroplasts
contributed.... through photosynthesis
Determine whether a particular set of data would be best depicted using a
scatterplot, bar graph, or line graph - ANSWER-
AND ANSWERS
Recognize that all O2 on earth stems from biological processes. - ANSWER-
Recognize that the geology of earth has been dramatically changed by biology. -
ANSWER-from o2 fluctuations...
many minerals biogenic, made from o2
o2 in atmosphere - ANSWER-cyano- increased o2...
-green algae chloro. made more BUT o2 first went in to oxidation of minerals.. when
those were filled, o2 released in air and increased!! (especially from phytoplankton in
ocean)
Diffusion:
Describe the mechanism of diffusion at the level of single particles - ANSWER-
moves randomly, NEVER stops, unpredictable
Diffusion:
Describe the pattern observed due to diffusion at the level of many particles -
ANSWER-moves from areas of high concentration to areas of low concentration,
predictable, once it reaches equilibrium movement can not be predicted
Explain how the behavior of single particles explains the observed pattern at the
many-particles level - ANSWER-
Explain the relationship between distance and time during diffusion - ANSWER-
diffusion time increases with the square of the distance
[EXAMPLE] 2x distance equals....
4 fold time
[EXAMPLE] 10x distance equals....
100 fold time
diffusion works great within what types of cells? except for which cells? - ANSWER--
within cells that lengthen between 1-100 micrometers
-doesn't work good within axons
Recall the important consequence or limitations to organisms of using diffusion for
transport of molecules - ANSWER-
O2 levels in atomosphere - ANSWER-cyanobacteria and green algae chloroplasts
contributed.... through photosynthesis
Determine whether a particular set of data would be best depicted using a
scatterplot, bar graph, or line graph - ANSWER-
