IB Biology HL A1.1.4 Adhesion of Water Questions
Explain how water adheres to polar surfaces, supports capillary movement in soil and cell walls, and helps refill xylem vessels.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Relate adhesion to polar or charged surfaces, capillary rise in soil and cell walls, and refilling xylem vessels.
IB Biology HL A1.1.4 Adhesion of Water Questions question 1
[Maximum number: 2]
Outline the properties of water molecules that permit them to move upwards in plants.
a. water molecules are polar
OR
can form hydrogen bonds
b. cohesion between water molecules allows continuous water columns
OR
cohesion between water molecules allows transpiration stream «to form in xylem»
c. adhesion of water to the walls of xylem vessel «helps water rise»
d. water evaporates at environmental temperatures allowing transpiration pull
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