Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
47 Cards in this Set
- Front
- Back
|
What does the bark consist of?
|
Everything outside vascular cambium
|
|
|
What vascular tissue makes up the inner bark?
|
Phloem
|
|
|
What does the outer bark?
|
Cork tissue and cork cambium
|
|
|
Where is the cork cambium located?
|
Outside the phloem
|
|
|
What is the cork cambium composed of?
|
Cork cells (outer face) and cork parenchyma (inner face)
|
|
|
The cork cambiums cell walls are water proof. The substance that makes the cell wall water proof is ..._______.
|
Suberin
|
|
|
What is another name for transport?
|
Translocation
|
|
|
Is transport uni or bidirectional
|
Uniderectional
|
|
|
What is the rate of water and mineral absorptions for evergreen conifers ?
|
120 cm/hr
|
|
|
What is the rate of water and mineral absorptions for Angiosperm vines?
|
15000 cm/hr
|
|
|
What is tension
|
A cohesion mechanism
|
|
|
This mechanism is like "sucing water through a straw" at this part of the plant (2 answers)
|
Tension. At the top of the plant
|
|
|
What pulls water up?
|
xylem
|
|
|
Where does the energy for tension come from?
|
The sun
|
|
|
Water column must be continuous to cause this?
|
tension
|
|
|
Water molecules exhibit cohesion due to hydrogen bonding in this mechanism
|
tension
|
|
|
What allows water molecules to stick to interior walls of vessels and tracheids. (this is the definiton What is the word)
|
adhesion
|
|
|
Why is water lost by evaporation ?
|
Because the air is drier than leaf interior
|
|
|
When water lost from leaf pulls water from ____,_____, and ______
|
stem, roots, ground
|
|
|
What is embolism?
|
Sever tension, water column breaks, cavitation
|
|
|
During this threat to plants there is a partial vacuum and water vapor
|
embolism
|
|
|
Expands until a barrier is reached
|
embolism
|
|
|
Movement of materials is slower in conifers or flowering plants?
|
conifers
|
|
|
is the flow of photosynthates slower in the phloem or the xylem
|
xylem
|
|
|
what is the source of movement called?
|
Sink
|
|
|
This is the storage site for photosynthates, and also the source for movement
|
The roots is the storage sight and it is also known as the sink which is the source for movement
|
|
|
These structures are the source
|
leaves
|
|
|
What is the mechanism for pressure flow hypothesis?
|
Exact mechanism is not known
|
|
|
Hydrostatic pressure gradient between source and sink
|
Pressure flow hypothesis
|
|
|
Higher turgor pressure at source or sink
|
source
|
|
|
lower turgor pressure at source or sink?
|
Sink
|
|
|
pressure flow hypothesis uses this structure for long distance transportation
|
Sieve tube
|
|
|
what is the source in phloem loading?
|
Leaf
|
|
|
In phloem loading, the mesophyll is this type of cell (think short distance carrying of loads)
|
Companion cells
|
|
|
Phloem Loading: sugar transfers from the ________-->_______--->_______
|
mesophyll, companion, sieve tube
|
|
|
What mechanism is used to pump sugar from one cell to another
|
Active transport
|
|
|
This sugar is found in the phloem sap
|
sucrose
|
|
|
phloem sap travels across the sieve plates through the openings nown as the ______ ______
|
sieve pores
|
|
|
Phloem sap is pushed through by _____
|
pressure
|
|
|
phloem loading begins at the ?
|
leaf cells
|
|
|
Phloem unloading begins at the?
|
Sink=root
|
|
|
During this phase of the phloem, sucrose is effluxed
|
Phloem unloading
|
|
|
What is the direction of flow (include names of passing structures) of phloem unloading
|
Sieve tube--> Parenchma--> parenchyma storage
|
|
|
What two things are secreted during phloem damage
|
P-protein and callose
|
|
|
Forms slime plug (when cut)
|
P-protein and callose
|
|
|
What would be lost if the phloem did not form slime plugs (like a cut)
|
Phloem sap
|
|
|
Blocks sieve plate/ pore when this happens
|
phloem is damaged
|
