BI-2228
Aerobic respiration
Biology · Secondary 4 · Hard · Aerobic respiration
A gardener sets up two bins to make compost from the same mass of dead leaves.
• Bin A has many air holes and is turned regularly.
• Bin B is sealed tightly with almost no air inside.
Which statement best explains the difference in how decomposition occurs in the two bins?
• Bin A has many air holes and is turned regularly.
• Bin B is sealed tightly with almost no air inside.
Which statement best explains the difference in how decomposition occurs in the two bins?
- Bin A allows aerobic bacteria to respire using oxygen; Bin B favours anaerobic bacteria that respire without oxygen.
- Bin A allows anaerobic bacteria to respire without oxygen; Bin B favours aerobic bacteria that need oxygen.
- Both bins only allow aerobic respiration because bacteria do not respire anaerobically.
- Both bins only allow anaerobic respiration because oxygen is toxic to bacteria.
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