Transport in the Phloem
Xylem/Transpiration
Movement&root pressure
General
Mixed transport
100
This is the mechanism that transports sucrose and organic material through the phloem of the plant
Translocation
100
These three main factors play a role in the cohesion-tension model
Transpiration, adhesion and cohesion
100
The process of osmosis acts between concentration gradients from a concentration of...
low to high
100
The phloem is a tissue that transports sugar from the leaves to the roots underground which is the opposite of the....
Xylem
100
A fungicide dissolved in water was applied to the soil in which a rose plant was growing. It later appeared in the leaves. How did the fungicide reach the leaves?
A. Movement up a water potential gradient
B. Transpiration pull in xylem
C. Translocation in phloem
D. Facilitated diffusion
B. Transpiration pull in xylem
200
Translocation always moves sucrose from a ____ to a _____
Source to a sink
200
This percentage of water is evaporated during transpiration
90%
200
This is the proper term for the diffusion of water molecules and particles across a membrane?
Osmosis
200
What is the name of the structure that provides sugar to sieve tubes?
Companion cell
200
Cobalt chloride paper is blue when dry but turns pink with water. Blue cobalt chloride paper was fastened to the upper and lower surfaces of a plant leaf. After 20 minutes, many small pink dots were observed on the paper on the lower surface, and a few pink dots were seen on the upper surface. What conclusions can be drawn?
I. There are more stomata on the lower surface than on the upper surface.
II. Stomata on the upper surface are blocked by the waxy cuticle.
III. More transpiration occurs through the lower surface than through the upper surface.
I and III only
300
In both bulbs, this allows water to pass but does not allow sucrose to pass
Permeable membrane
300
Root pressure can approximately pull water ____ meters
10 meters
300
This is why water droplets on the edges of leaves result of Root Pressure evaporate?
They cannot evaporate because of the humidity being high and the transpiration
300
This is a model that explains how sugar moves from a source to a sink
Pressure flow model
300
In a plant, what tissue(s) is/are specially adapted to transport sucrose?
D
400
The phloem has this type of pressure causing the the flow from source to sink
Positive
400
These are a some examples as to how transpiration is caused (only have to give one)
Dry air, heat, and wind
400
Finish the statement
When a water solution has a high concentration of solutes......
the concentration of water molecules is low
400
What colour would a green plant be
Green
400
Which letter identifies phloem?
B
500
During the formation of a fruit, the movement of sucrose by translocation causes this to happen
Slowing down of growth in other areas of the plant
500
Negative pressure creates a pull of _____ to replace the lost water
Water
500
This causes more volume to move in through osmosis
High amount of solutes in the xylem
500
Various sieve tubes can conduct this in opposite directions from different sources to sinks
Phloem sap
500
Under which conditions would the rate of transpiration be greatest?
A. Humid and cool with wind
B. Dry and hot with wind
C. Dry and hot with no wind
D. Humid and cool with no wind
B. Dry and hot with wind