DP Biology (last assessment 2024)
Question 19M.1.HL.TZ2.30
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.HL.TZ2.30 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Identify | Question number | 30 | Adapted from | N/A |
30.
[Maximum mark: 1]
19M.1.HL.TZ2.30
What observation did William Harvey use as evidence for the circulation of blood?
A. The ventricles of the heart pump blood out into arteries.
B. Valves ensure unidirectional flow of blood.
C. Capillaries carry blood from arteries to veins.
D. All organs of the body have a separate blood supply.
[1]
Markscheme
B
Examiners report
In topic 6.2 candidates should study William Harvey’s discovery of the circulation of the blood with the heart acting as the pump. This means that candidates were supposed to know how the experiments on blood circulation were performed. This question did not discriminate well.
