Sherpa

Existing user?

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

Pyramids of Biomass Flashcards

All 4 cards in this deck

What does a pyramid of biomass represent?: The relative amount of biomass in each trophic level of a food chain.
In a pyramid of biomass, which trophic level is drawn at the bottom?: Trophic level 1 — the producers (plants and algae).
True or false? The width of each bar in a pyramid of biomass shows the number of organisms at that trophic level.: False. It shows the biomass (mass of living material) at that level, not the number of organisms.
Why does a pyramid of biomass become narrower towards the top?: Because only about 10 % of the biomass at each level is transferred to the level above; the rest is lost.