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Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Biotic Factors Flashcards

All 7 cards in this deck

What are biotic factors?: Living factors of the environment that can affect a community, e.g. predators.
List the four biotic factors named in the specification that can affect a community.: Availability of food, new predators arriving, new pathogens, and one species outcompeting another.
What three resources do animals often compete for?: Food, mates and territory.
How can a new predator arriving affect a community?: Prey are eaten, so prey numbers fall rapidly; species that depend on that prey are also affected.
What happens when one species outcompetes another for a resource?: The numbers of the outcompeted species fall until they are no longer sufficient to breed, and it may die out from that habitat.
True or false? Rabbits eating plants is a biotic factor, but nitrates in the soil are abiotic.: True. Rabbits are living organisms; nitrate mineral ions are non-living.
Why does an increase in the diversity of trees in a rainforest increase animal diversity?: More or different types of food are available, and more or different habitats and nest sites are available.