DP Biology (last assessment 2024)
Question 18M.3.SL.TZ2.13
| Date | May 2018 | Marks available | [Maximum mark: 4] | Reference code | 18M.3.SL.TZ2.13 |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Deduce, Identify | Question number | 13 | Adapted from | N/A |
13.
[Maximum mark: 4]
18M.3.SL.TZ2.13
Gersmehl diagrams for two ecosystems are shown.
(a)
Identify the processes represented by the arrows labelled A and B in both diagrams.
[2]
Markscheme
a. Process A: decomposition/decay
b. Process B: leaching/erosion/run-off/weathering
Examiners report
(b)
Deduce, with a reason, which ecosystem is representative of a tropical rainforest.
[2]
Markscheme
a. ecosystem I
b. low levels of litter due to high rates of decomposition
OR
high amounts of biomass related to high rates of productivity
OR
weathering/leaching due to high rates of precipitation
Examiners report
