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Date May 2016 Marks available 1 Reference code 16M.1.SL.TZ0.18
Level Standard level Paper Paper 1 Time zone TZ0
Command term Deduce Question number 18 Adapted from N/A

Question

What limits the length of food chains in an ecosystem?

A. The size of individual organisms
B. Competition between organisms
C. The loss of energy between trophic levels
D. Natural selection

Markscheme

C

Examiners report

This question was a very good discriminator.

Syllabus sections

Core » Topic 4: Ecology » 4.2 Energy flow
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