Feeding Relationships

The diagram shows the feeding relationships in a food web.

Which organism may feed as both a secondary and a tertiary consumer?

• Fox

• Owl

• blackbird

• rabbit

The diagram shows a food web. How many organisms feed at more than one trophic level?

• 0

• 1

• 2

• 3

The diagram shows energy transfer through a food chain. The labelled arrows

represent the energy transfers.

Which energy transfers are shown by the labelled arrows?

• X is heat energy transfer and Z is chemical energy transfer.

• Y is chemical energy transfer and X is light energy transfer.

• X is chemical energy transfer and Y is heat energy transfer.

• Z is heat energy transfer and W is light energy transfer

The organisms in a food chain can be represented by pyramids of numbers or pyramids of biomass.

Which diagram represents a pyramid of numbers?

• 
• 
• 
• 

The diagram contains information about the number and mass of organisms in a food web.

What is the total biomass of all the primary consumers in this food web?

• 130 kg

• 420 kg

• 3650 kg

• 130 000 kg

The diagram shows a pyramid of numbers.

What is the correct description of the trophic levels?

• 
• 
• 
• 

The diagram shows a food chain in a rock pool. What will happen if the number of secondary consumers increases?

There will be

• fewer crabs.

• fewer seagulls

• fewer whelks

• less seaweed

Consider the diagram of a food chain

• 
• 
• 
• 

Which trophic level has the greatest amount of energy?

• 
• 
• 
• 

The diagram shows the energy within the producers in an ecosystem and how much is transferred to primary consumers and eventually lost to the environment.

How much energy is transferred from primary consumers to secondary consumers?

• 5 kJ

• 50 kJ

• 500 kJ

• 5000 kJ