Unit 2: Plants Flashcards
1
Q
Define “APOPLAST PATHWAY”
A
MOVEMENT OF ?
THROUGH CELL WALLS
2
Q
How XYLEM tissue adapted for its function:
A
LONG TUBES w/ NO END WALLS
–> CONTINUOUS ? COLUMN
NO CYPTOPLASM
—> allows easier water flow
3
Q
Cut stem. Transpiration continued, how?
A
Water movies in dead cells
xylem is NON-living tissue
process is passive
4
Q
How does an AIR BUBBLE block Movement of Water?
A
Transpiration Water in Xylem pulled up Water molecules cohere - H bonds SO, ? = SINGLE COLUMN • AIR BUBBLE BREAKS COLOUM and prevents COHESION
5
Q
Root Pressure?
A
Active Transport of of IONS/SALTS by ENDODERMIS into XLYEM • LOW WP • WATER MOVES DOWN WP GRADIENT
6
Q
Diametre of Tree ⬇️
Why does this NOT support Root Pressure Theory?
A
Root pressure gives OUTWARD force
? should become WIDER
Xylem VESSELS become wider
7
Q
How does water enter root hair cells from soil?
A
HIGH wp ➡️ LOW wp
• via OSMOSIS
