Pyramids of Biomass and Numbers

Flashcards by esther.babatunde, updated more than 1 year ago
Created by esther.babatunde almost 8 years ago


GCSE Higher Biology (B2) Flashcards on Pyramids of Biomass and Numbers, created by esther.babatunde on 02/20/2014.

Resource summary

Question Answer
What is trophic level? A feeding level
What decreases as you go down trophic levels? Energy, Biomass and usually number of organisms
Why are biomass pyramids shaped like a pyramid? Biomass is lost at each stage
Dry mass The mass of the organism when all water has been removed (dried out)
Ethical reasons of construction biomass pyramids? You need to kill the animal so can't be done every time
Why could it be difficult to construct accurate pyramids of biomass? Some organisms feed at more than on trophic level
How are pyramids of number and biomass different? Pyramids of numbers only shows numbers of organisms at each stage not their mass
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