transpiration + translocation Flashcards
1
Q
what is transpiration?
A
the loss of water by evaporation from leaves
2
Q
what is the transpiration stream?
A
the movement of water from the roots to the leaves
3
Q
where is the stomata found on leaves?
A
the lower surface
4
Q
what causes water to enter the roots?
A
osmosis
5
Q
what has happened for the stoma to be open?
A
- guard cells have taken in water
- guard cells have swelled up
6
Q
what has happened for the stoma to be closed?
A
- guard cells have lost water
- they have become flaccid (become soft and lack structure)
7
Q
why is one cells wall thicker on the stoma than the other?
A
to help with the opening and closing of the stoma
8
Q
what is the point of translocation?
A
to transport sucrose around a plane
