| Date | November 2011 | Marks available | 1 | Reference code | 11N.1.HL.TZ0.39 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 39 | Adapted from | N/A |
Question
What is a role of xylem?
A. It absorbs minerals from the soil by active transport.
B. It translocates amino acids from source to sink.
C. It carries glucose to the leaves.
D. It contributes to the plant support with lignified walls.
Markscheme
D
Examiners report
This question was one of the best discriminators of the exam. Strong candidates answered D correctly while the weaker candidates were choosing A as an answer.
