AQA A2 Biology - Chapter 5 Energy and Ecosystems

What is a producer?

What are consumers? - Distinguish between primary, secondary and tertiary consumers

What is a decomposer? - Give an example

What is the difference between a food chain and a food web?

What is the principle source of energy in all ecosystems?

Describe four ways energy is lost between the sun and the producer

Describe four ways energy is lost between the producer and the consumer

What is the equation for energy efficiency?

Give the equation for net production

What are the drawbacks associated with a pyramid of number?

What are the advantages and disadvantages associated with a pyramid of biomass?

Why is a pyramid of energy often the best choice?

What are the units associated with energy in an energy pyramid?

What is an agricultural ecosystem?

What is productivity, in relation to plants?

Give to additional sources of energy in an agricultural ecosystem

What four things should a pesticide be?

Describe biological control of pests:

What does integrated pest control involve?

How is energy conserved when rearing livestock?