CourseCourseConceptConceptDocsDocuments

IB ESS HL 4.3.1 Aquatic Primary Producers Questions

Explain the role of phytoplankton, algae and aquatic plants as primary producers.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify algae, seaweed and seagrass as aquatic primary producers
  • explain how aquatic producers capture energy and support food webs, biomass and renewable food production
  • link producer abundance and productivity to aquatic ecosystem functioning and human food supply

Learn this topic

Study 4.3.1—Aquatic primary producers conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.3.1 Aquatic Primary Producers Questions question 1

[Maximum number: 1]
Integrated aquaculture system

Figure:Integrated aquaculture system

the integrated-aquaculture diagram shown above represents a system of aquaculture with four groups of harvestable species.

Identify one producer in the system illustrated in the integrated-aquaculture diagram shown above.

All question bank results loaded