CAIE IGCSE Biology 19.2.5 Consumers in Food Chains
Practise defining a consumer as an organism that obtains energy by feeding on other organisms.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Practise defining a consumer as an organism that obtains energy by feeding on other organisms.
Fig. 6.1 shows part of the carbon cycle in the ocean.

Fig. 6.1 (not to scale)
Suggest the role of zooplankton in this ecosystem.
decomposer ;