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IB Biology HL C4.2.14 Restrictions on Trophic Levels Questions

Large energy losses restrict food chains to a few trophic levels. Higher trophic levels usually support less biomass and fewer individuals. IB Biology HL C4.2.14 examines these limits.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain why fewer individuals are supported at higher trophic levels as energy is lost between levels.

IB Biology HL C4.2.14 Restrictions on Trophic Levels Questions question 1

[Maximum number: 1]

Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?

A

Food eaten by animals at the highest trophic level has a lower energy content per gram

B

Energy losses through the food chain

C

Conversion of heat energy into chemical energy

D

Biomass of producers is small

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