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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

Sustainable Fisheries Flashcards

All 6 cards in this deck

Why are fish stocks in the oceans declining?: Fish are being caught faster than they can breed (overfishing), because the growing human population demands more fish.
Why is it important to maintain fish stocks at a certain level?: So that breeding continues — otherwise certain species may disappear altogether from some areas.
Name two methods used to conserve fish stocks at a sustainable level.: Control of net size and the introduction of fishing quotas.
Why do fishing quotas help return fish stocks to a sustainable level?: Fewer fish are caught, so the remaining fish survive and reproduce.
How does using nets with a larger mesh size conserve fish stocks?: Young (small) fish escape through the mesh and survive to reproduce.
True or false? A fishing quota means fishing for that species is banned completely.: False. A quota limits the number (or mass) of fish that may be caught, so enough remain to reproduce.