1.1. Earthworms are decomposers which break down dead plant and animal material in the soil. Decomposition is faster in aerated soil because the earthworms can respire aerobically.

Explain why aeration of the soil ensures that the earthworms can respire aerobically?

1.2. If the ground becomes waterlogged then less oxygen will be available in the soil and the earthworm will need to respire anaerobically.

Give the word equation used to represent anaerobic respiration in earthworms.

1.3. An oxygen debt is often associated with anaerobic respiration. 

Describe the process that occurs in the human body during an oxygen debt.

1.4. The table below lists some other features of aerobic or anaerobic respiration.

Complete the table to indicate whether the statements apply to aerobic respiration, anaerobic respiration or both.

The first statement has been completed for you.