CAIE IGCSE Biology 19.1.2 Energy Flow Through Living Organisms
Practise tracing light energy into producers, chemical energy between organisms and energy transfer to the environment.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- label light energy entering a producer from the Sun on an energy-flow diagram
- identify chemical energy transferring from producers to consumers through feeding
- trace energy from living organisms to the environment in the form shown
19.1.2—Flow of energy through living question 1
The dominant grass species in an African grassland ecosystem are star grass and red oat grass.
- Star grass is eaten by antelope species, such as topi and Thomson's gazelle.
- Smaller animals such as mice and grasshoppers feed on red oat grass.
- Topi and Thomson's gazelle are eaten by predators such as cheetahs, lions and serval cats.
- Grasshoppers and mice are eaten by serval cats and tawny eagles.
- Vultures feed on dead mammals.
Fig. 1.1 shows part of the food web for this ecosystem.
Fig. 1.1
State what happens to energy when it leaves a food web.
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