IGCSE Biology

Identify the following as the trophic levels in food webs, food chains and ecological pyramids: producers, primary consumers, secondary consumers, tertiary consumers and quaternary consumers

Describe a trophic level as the position of an organism in a food chain, food web or ecological pyramid

Discuss the advantages of using a pyramid of biomass rather than a pyramid of numbers to represent a food chain

Draw, describe and interpret pyramids of numbers and pyramids of biomass

Use food chains and food webs to describe the impact humans have through overharvesting of food species and through introducing foreign species to a habitat

Describe a decomposer as an organism that gets its energy from dead or waste organic material

Describe a carnivore as an animal that gets its energy by eating other animals

Describe a herbivore as an animal that gets its energy by eating plantsDescribe a herbivore as an animal that gets its energy by eating plants%MCEPASTEBIN%

State that consumers may be classed as primary, secondary, tertiary and quaternary according to their position in a food chain

Describe a consumer as an organism that gets its energy by feeding on other organisms