May/June 2026 Paper 21

2026 · 40 questions · 40 parts · 40 marks

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34Species InteractionsMedium1 mark
The diagram shows a marine food web.
Marine food web: phytoplankton to zooplankton and to mussels; zooplankton to prawns and to mussels; prawns to fish; mussels to crabs
Humans harvest prawns for food. What effects would the overharvesting of prawns have on the populations in this food web?
fishmusselsphytoplankton
Adecreaseincreasedecrease
Bdecreaseincreaseincrease
Cincreasedecreasedecrease
Dincreasedecreaseincrease