User interface language: English | Español

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
Show 47 related questions
Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics)
Option C: Ecology and conservation

View options