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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

Levels of Organisation Flashcards

All 6 cards in this deck

What is a producer?: An organism that makes its own biomass (glucose) by photosynthesis, usually a green plant or alga.
Why does every food chain begin with a photosynthetic organism?: Only producers can use light energy to synthesise glucose, making the biomass that all other organisms feed on.
In a food chain, what name is given to an animal that eats a primary consumer?: A secondary consumer.

e.g. grass → rabbit (primary) → fox (secondary)
What are predators and prey?: Predators are consumers that kill and eat other animals; prey are the animals that are eaten.
True or false? In a stable community the numbers of predators and prey stay constant.: False. They rise and fall in cycles.
In a predator–prey cycle graph, which population peaks first?: The prey population peaks first; the predator population peaks shortly afterwards, because more food allows more predators to survive and breed.