Biology 3.1.3. Flashcards
1
Q
Diffusion
A
the net passive movement down a concentration gradient.
2
Q
Sink
A
The site where assimilates are loaded into the phloem.
3
Q
Source
A
The site where assimilates are unloaded from the phloem.
4
Q
Transpiration
A
the loss of water vapour from the aerial parts of plants, via stomata [parts which are completely exposed in air. E.g. leaves and stem].
5
Q
Transpiration stream
A
movement of water up xylem vessels, from the roots to the leaves.
6
Q
Vascular bundle
A
the transport system in plants, composed of xylem and phloem.
7
Q
Xerophyte
A
plants that have evolved/ adapted to survive in dry conditions.
