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Combined Science: Biology

GCSE · Edexcel · higher

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  6
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  8
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  6
Cycles within Ecosystems

Abiotic & Biotic Factors Flashcards

All 6 cards in this deck

Name four abiotic factors that affect communities.: Temperature, light, water and pollutants.
Name the two biotic factors named in the specification that affect communities.: Competition and predation.
True or false? Light intensity is a biotic factor.: False. Light is an abiotic (non-living) factor; biotic factors are living, such as competition and predation.
How does a rise in predator numbers affect the prey population, and what happens next?: The prey population falls; the predator population then falls because there is less food, letting prey numbers recover.
Why can a non-indigenous plant come to cover a whole lake? Give two reasons.: Conditions are suitable for its growth/photosynthesis so it grows and reproduces, and it outcompetes the natural plants; also no natural herbivores eat it.
What is competition between organisms?: When organisms of the same or different species need the same limited resources (e.g. food, water, light or space), so not all of them get enough.