AQA · Biology · 8461
GCSE Biology: Trophic levels
Ecology · AQA GCSE Biology (8461), specification point 4.7.4.1. Cards are generated from the exam board's own specification for "Trophic levels", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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Which organisms occupy trophic level 1?
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Plants and algae — the producers, which make their own food.
Plants and algae make their own food and are called ?.
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producers
How are trophic levels numbered along a food chain?
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Starting at level 1 with plants and algae, then numbered subsequently according to how far the organism is along the food chain.
What are herbivores called in terms of trophic levels?
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Primary consumers (trophic level 2) — they eat plants/algae.
What are carnivores that eat herbivores called?
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Secondary consumers (trophic level 3).
Carnivores that eat other carnivores are called ? consumers.
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tertiary
Which trophic level do tertiary consumers occupy?
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Level 4.
Define an apex predator.
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A carnivore with no predators.
How do decomposers break down dead plant and animal matter?
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By secreting enzymes into the environment, which digest the matter outside the organism.
How do the products of decomposition enter a decomposer microorganism?
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Small soluble food molecules diffuse into the microorganism.
Decomposers break down dead matter by secreting ? into the environment.
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enzymes
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