Bio 1500
1. molecules are added to water and then the molecules move through the
water via diffusion. a concentration gradient no longer exists when..: the density of
the added molecules is the same throughout the water
2. bar graph is most commonly used when data are:: categorical
3. You want to know the effect of air temperature on the time it takes for Jello
to set. You run an experiment in which you put bowls of freshly dissolved Jello
into chambers that maintain different air temperatures, and you measure how
long it takes for the Jello to set hard enough that you can place a penny on
top without it falling through. Which of the graphs below is most appropriate
for representing your data? Note: the two options might be in reverse order in
your choices, so be sure to read the number. (If the image isn't visible on your
,screen, look at the figure labeled 'graphs' on the slide.)
option 1: increasing
option 2: decreasing: option 1
4. based on scientific evidence, the earth formed approximately years ago,
and life began approximately years ago: 4.6 billion, 3.5 billion
5. diffusion is often defined as the movement of molecules from an area of
high concentration to an area of low concentration. which of the following
statements best explains the reason for this pattern of movement?: the molecules
move randomly resulting in more of them moving away from. a high-denisty area than moving away from a low-density
area
6. which of the following statements about dragonflies is false: although they can see,
they mostly communicate with sound rather than sight
,7. in a survey conducted by the Wall Street journal which of the following attrib-
utes do employers most strongly value when deciding which college graduates
to hire: ability to work in a team
8. which of the following statements best describes the conditions on much of
earth during the carboniferous period: swampy forests
9. theres all orange on one side and all blue particles on the other. how are the
particles likely to move: orange particle: movements in all directions are equally likely
, blue particle: movements in all directions are equally likely
10. suppose you earn an 80% on your lab worksheets, quizzes, and participation
scores. however, you frequently skip discussion and end up with a discussion
average of 50%. what will be your combined lab and discussion score?: 40%
11. simple diffusion is very efficient for moving molecules around inside cells,
but it is inefficient for moving molecules from one part of the body, such as the
brain, to another part of the body, such as the heart. why?: since the time for diffusion
increases with the square of the distance the molecules need to move, diffusion is too slow to move molecules around
the body
12. the early atmosphere on earth contained only trace amounts of O2, which
now makes up about 20% of the air we breathe. where did the O2 in the
atmosphere come from?: it was released by photosynthetic organisms
1. molecules are added to water and then the molecules move through the
water via diffusion. a concentration gradient no longer exists when..: the density of
the added molecules is the same throughout the water
2. bar graph is most commonly used when data are:: categorical
3. You want to know the effect of air temperature on the time it takes for Jello
to set. You run an experiment in which you put bowls of freshly dissolved Jello
into chambers that maintain different air temperatures, and you measure how
long it takes for the Jello to set hard enough that you can place a penny on
top without it falling through. Which of the graphs below is most appropriate
for representing your data? Note: the two options might be in reverse order in
your choices, so be sure to read the number. (If the image isn't visible on your
,screen, look at the figure labeled 'graphs' on the slide.)
option 1: increasing
option 2: decreasing: option 1
4. based on scientific evidence, the earth formed approximately years ago,
and life began approximately years ago: 4.6 billion, 3.5 billion
5. diffusion is often defined as the movement of molecules from an area of
high concentration to an area of low concentration. which of the following
statements best explains the reason for this pattern of movement?: the molecules
move randomly resulting in more of them moving away from. a high-denisty area than moving away from a low-density
area
6. which of the following statements about dragonflies is false: although they can see,
they mostly communicate with sound rather than sight
,7. in a survey conducted by the Wall Street journal which of the following attrib-
utes do employers most strongly value when deciding which college graduates
to hire: ability to work in a team
8. which of the following statements best describes the conditions on much of
earth during the carboniferous period: swampy forests
9. theres all orange on one side and all blue particles on the other. how are the
particles likely to move: orange particle: movements in all directions are equally likely
, blue particle: movements in all directions are equally likely
10. suppose you earn an 80% on your lab worksheets, quizzes, and participation
scores. however, you frequently skip discussion and end up with a discussion
average of 50%. what will be your combined lab and discussion score?: 40%
11. simple diffusion is very efficient for moving molecules around inside cells,
but it is inefficient for moving molecules from one part of the body, such as the
brain, to another part of the body, such as the heart. why?: since the time for diffusion
increases with the square of the distance the molecules need to move, diffusion is too slow to move molecules around
the body
12. the early atmosphere on earth contained only trace amounts of O2, which
now makes up about 20% of the air we breathe. where did the O2 in the
atmosphere come from?: it was released by photosynthetic organisms
