DP Biology (first assessment 2025)
Question 20N.1B.SL.TZ0.2b
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1B.SL.TZ0.2b |
| Level | SL | Paper | 1B | Time zone | TZ0 |
| Command term | State | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
20N.1B.SL.TZ0.2b
(b)
State one feature of the rings that has to be kept constant apart from their initial diameter.
[1]
Markscheme
a. width/section depth/slice of the ring;
b. same animal/age/freshness/temperature;
Don’t accept thickness or diameter.
Examiners report
In part (b) many candidates suggested that the samples should be of the same thickness.
