Date | May 2018 | Marks available | 2 | Reference code | 18M.3.SL.TZ2.13 |
Level | Standard level | Paper | Paper 3 | Time zone | Time zone 2 |
Command term | Identify | Question number | 13 | Adapted from | N/A |
Question
Gersmehl diagrams for two ecosystems are shown.
Identify the processes represented by the arrows labelled A and B in both diagrams.
[2]
a.
Deduce, with a reason, which ecosystem is representative of a tropical rainforest.
[2]
b.
Markscheme
a. Process A: decomposition/decay
b. Process B: leaching/erosion/run-off/weathering
a.
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
b.
Examiners report
a.
b.
Syllabus sections
Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics) » C.2 Communities and ecosystems
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