AQA · Biology · 8461
GCSE Biology: Communities
Ecology · AQA GCSE Biology (8461), specification point 4.7.1.1. Cards are generated from the exam board's own specification for "Communities", and every card links back to the page it came from. Specification © AQA — used with attribution.
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Define an ecosystem.
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The interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment.
The living organisms in an ecosystem are the ? components.
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biotic
The non-living parts of an ecosystem are the ? components.
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abiotic
What do animals in a community compete for?
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Food, mates and territory.
Define interdependence in a community.
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Each species depends on other species (for food, shelter, pollination, seed dispersal etc.), so removing one species can affect the whole community.
What is a stable community?
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One where all the species and environmental factors are in balance, so population sizes remain fairly constant.
Why do organisms need a supply of materials from their surroundings?
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To survive and reproduce.
Give two things a species may depend on other species for.
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Any two of: food, shelter, pollination, seed dispersal.
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