DP Biology (first assessment 2025)
Question 21M.2.HL.TZ2.d
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.HL.TZ2.d |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Deduce | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 2]
21M.2.HL.TZ2.d
Deduce the conclusions that can be drawn from the data in the graph.
[2]
Markscheme
a. reduced acetylcholine does not affect larval survival in the first two days ✔
b. reduced acetylcholine causes increased mortality from day 3 onwards ✔
c. 90 % versus 40 % survival/other valid numerical comparison by day 5
OR
(much) greater decrease in survival occurs between days 4 and 5/by day 5 for the reduced group ✔
Do not accept answers without times/ days.
Examiners report
In general, the data analysis question was well attempted by the majority of students.
An answer comparing the survival as the days progressed was expected. Answers tended to be too general.
