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Date May 2017 Marks available 1 Reference code 17M.1.SL.TZ2.17
Level Standard level Paper Paper 1 Time zone Time zone 2
Command term Question number 17 Adapted from N/A

Question

What is lost between trophic levels in ecosystems and cannot be recycled?

A. Heat

B. Nitrogen

C. Carbon compounds

D. Biomass

Markscheme

A

Examiners report

[N/A]

Syllabus sections

Core » Topic 4: Ecology » 4.2 Energy flow
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