AQA · Biology · 8461
GCSE Biology: Levels of organisation
Ecology · AQA GCSE Biology (8461), specification point 4.7.2.1. Cards are generated from the exam board's own specification for "Levels of organisation", and every card links back to the page it came from. Specification © AQA — used with attribution.
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Which organisms are the producers of biomass for life on Earth?
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Photosynthetic organisms (green plants and algae), which make glucose by photosynthesis.
All food chains begin with a ?, which synthesises molecules.
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producer
Which molecule do green plants and algae make by photosynthesis?
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Glucose.
What do food chains represent within a community?
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Feeding relationships between organisms (who eats whom).
Which two sampling tools do ecologists use to determine the distribution and abundance of species?
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Transects and quadrats.
What is a primary consumer in a food chain?
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An organism that eats producers.
What is a secondary consumer in a food chain?
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An organism that eats primary consumers.
Secondary consumers may in turn be eaten by ? consumers.
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tertiary
What is a predator?
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A consumer that kills and eats other animals.
In ecology, what is prey?
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An animal that is killed and eaten by a predator.
How do predator and prey numbers change over time in a stable community?
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They rise and fall in cycles — prey numbers rise, then predators rise and prey fall, then predators fall.
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