BIO 152 EXAM 3 WITH PRECISE | | | | | |
DETAILED SOLUTIONS |
What are stomates for? - Correct answer ✔Opens when water moves into the
| | | | | | | | | | | | |
guard cells. |
Regulate the diffusion of gasses between the interior of the leaf and the
| | | | | | | | | | | | |
atmosphere.
let CO2 in
| |
How do guard cells use solute concentration to open/close stomates? - Correct
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answer ✔manage the solute concentration of the cytosol (and vacuole) with
| | | | | | | | | | |
respect to the areas outside of the cell.
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What does the cell wall do? - Correct answer ✔gives the plant rigidity and
| | | | | | | | | | | | | |
strength
Challenges that a multicellular organism must overcome: necessary | | | | | | | |
adaptations - Correct answer ✔Limits of diffusion/distribution | | | | | | |
Must stick together/support organism (in part)
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Cell to cell communication
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Regulate cell division and cell fate (development and reproduction)
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Defense
xylem - Correct answer ✔transport water (and soil minerals)
| | | | | | | |
,dead cells
|
phloem - Correct answer ✔transports sugar and hormones
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Phloem cells are a bit different as they are alive when they function.
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Have very few organelles.
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Large connections between successive phloem cells
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Which of the following would inhibit phloem function? - Correct answer
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✔Inhibit ATP production in source cells. | | | | |
Night time (so guard cells close stomates).
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Phloem transport: - Correct answer ✔Sugars transported "actively" that is using
| | | | | | | | | | |
ATP protein pumps
| |
Water is pushed because of a pressure gradient
| | | | | | |
From high pressure to low.
| | | |
Inhibition of ATP synthesis in leaf cells would - Correct answer ✔Inhibit xylem
| | | | | | | | | | | | |
movement
Inhibit phloem movement | |
How does transport between xylem and phloem differ? - Correct answer
| | | | | | | | | | |
✔phloem transports hormones and sugar | | | |
xylem transports water | |
, how does phloem work? - Correct answer ✔use ATP protein pumps
| | | | | | | | | |
from high pressure to low
| | | |
how does xylem work? - Correct answer ✔as h20 leaves the stomates it pulls on
| | | | | | | | | | | | | | |
the h2O collumn
| |
What sort of pressure are xylem and phloem cells under - Correct answer
| | | | | | | | | | | | |
✔xylem is under negative pressure | | | |
phloem is under positive pressure
| | | |
Which cells are alive at maturity and which dead? - Correct answer ✔xylem is
| | | | | | | | | | | | | |
dead
phloem cells are alive | | |
Source to sink - Correct answer ✔The "source" is the leaf where sugar is made
| | | | | | | | | | | | | |
The "sink" is where the sugar needs to go (e.g. fruits or the root in fall).
| | | | | | | | | | | | | | |
Sugar is loaded by the leaf and taken out at the sink. When sugar goes into the
| | | | | | | | | | | | | | | | |
phloem, it draws more water into the phloem, which has rigid walls.
| | | | | | | | | | |
Transpiration - Correct answer ✔O2 water vapor released, CO2 in | | | | | | | | |
transpiration accounts for 80% of terrestrial water flux. | | | | | | |
What does pollen do? - Correct answer ✔double fertilization
| | | | | | | |
DETAILED SOLUTIONS |
What are stomates for? - Correct answer ✔Opens when water moves into the
| | | | | | | | | | | | |
guard cells. |
Regulate the diffusion of gasses between the interior of the leaf and the
| | | | | | | | | | | | |
atmosphere.
let CO2 in
| |
How do guard cells use solute concentration to open/close stomates? - Correct
| | | | | | | | | | | |
answer ✔manage the solute concentration of the cytosol (and vacuole) with
| | | | | | | | | | |
respect to the areas outside of the cell.
| | | | | | |
What does the cell wall do? - Correct answer ✔gives the plant rigidity and
| | | | | | | | | | | | | |
strength
Challenges that a multicellular organism must overcome: necessary | | | | | | | |
adaptations - Correct answer ✔Limits of diffusion/distribution | | | | | | |
Must stick together/support organism (in part)
| | | | |
Cell to cell communication
| | | |
Regulate cell division and cell fate (development and reproduction)
| | | | | | | |
Defense
xylem - Correct answer ✔transport water (and soil minerals)
| | | | | | | |
,dead cells
|
phloem - Correct answer ✔transports sugar and hormones
| | | | | | |
Phloem cells are a bit different as they are alive when they function.
| | | | | | | | | | | |
Have very few organelles.
| | |
Large connections between successive phloem cells
| | | | |
Which of the following would inhibit phloem function? - Correct answer
| | | | | | | | | | |
✔Inhibit ATP production in source cells. | | | | |
Night time (so guard cells close stomates).
| | | | | |
Phloem transport: - Correct answer ✔Sugars transported "actively" that is using
| | | | | | | | | | |
ATP protein pumps
| |
Water is pushed because of a pressure gradient
| | | | | | |
From high pressure to low.
| | | |
Inhibition of ATP synthesis in leaf cells would - Correct answer ✔Inhibit xylem
| | | | | | | | | | | | |
movement
Inhibit phloem movement | |
How does transport between xylem and phloem differ? - Correct answer
| | | | | | | | | | |
✔phloem transports hormones and sugar | | | |
xylem transports water | |
, how does phloem work? - Correct answer ✔use ATP protein pumps
| | | | | | | | | |
from high pressure to low
| | | |
how does xylem work? - Correct answer ✔as h20 leaves the stomates it pulls on
| | | | | | | | | | | | | | |
the h2O collumn
| |
What sort of pressure are xylem and phloem cells under - Correct answer
| | | | | | | | | | | | |
✔xylem is under negative pressure | | | |
phloem is under positive pressure
| | | |
Which cells are alive at maturity and which dead? - Correct answer ✔xylem is
| | | | | | | | | | | | | |
dead
phloem cells are alive | | |
Source to sink - Correct answer ✔The "source" is the leaf where sugar is made
| | | | | | | | | | | | | |
The "sink" is where the sugar needs to go (e.g. fruits or the root in fall).
| | | | | | | | | | | | | | |
Sugar is loaded by the leaf and taken out at the sink. When sugar goes into the
| | | | | | | | | | | | | | | | |
phloem, it draws more water into the phloem, which has rigid walls.
| | | | | | | | | | |
Transpiration - Correct answer ✔O2 water vapor released, CO2 in | | | | | | | | |
transpiration accounts for 80% of terrestrial water flux. | | | | | | |
What does pollen do? - Correct answer ✔double fertilization
| | | | | | | |
