CourseCourseConceptConceptDocsDocuments

IB Biology HL C4.2.14 Restrictions on Trophic Levels Questions

Analyse how transfer losses restrict trophic-level number and explain the biomass, abundance and body-size patterns of high-level consumers in IB Biology HL C4.2.14.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how inefficient transfer and respiration or heat losses restrict food chains to a few trophic levels and leave fewer individuals at the highest trophic level.

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

All question bank results loaded