Transport in plants Flashcards
1
Q
What is the endodermis?
A
A water supply
2
Q
Transpiration definition
A
The evaporation of water from the leaves
3
Q
What affects transpiration?
A
Temperature, light intensity, humidity, waxy cuticle, air movement
4
Q
Water potential difference
A
Tendency for water to move via osmosis
5
Q
Adaptation of hydrophytes (plants in wet conditons)
A
Thin waxy cuticle
Open stomata
Air spaces = buoyancy
Wide, flat leaves
6
Q
What do pits in xylem do?
A
Allow water and minerals to move into and out of the xylem
7
Q
How are sieve tube elements different from normal plant cells?
A
They have no nucleus, few organelles, and a thin layer of cytoplasm
8
Q
What do companion cells do?
A
Carry out the living functions for sieve cells
