SSCE VCE Biology Biochemical Pathways and Energy Transformations: Matthew investigated how changes

Question

Matthew investigated how changes in environmental temperature affected oxygen (O₂) and carbon dioxide (CO₂) levels in the air around a cockroach. He used three digital probes linked to a computer, a closed animal chamber and a heat lamp in the experimental set-up.

a. Name the cellular process being investigated in Matthew’s experiment.

b. Identify the
   - dependent variables
   - independent variable.

Before placing the cockroach in the chamber, Matthew decided to measure the temperature, and carbon dioxide and oxygen levels for four minutes. The following results were recorded.

Time (minutes)     CO₂ (%)     O₂ (%)     Temperature (°C)
0                        0.04         22.3          29.5
1                        0.04         22.1          29.8
2                        0.03         22.0          30.0
3                        0.04         22.0          30.0
4                        0.04         21.8          30.0

Matthew investigated how changes in environmental temperature affected oxygen (O₂) and carbon dioxide (CO₂) levels in the air around a cockroach - VCE - SSCE Biology - Question 11 - 2017 - Paper 1

Worked Solution & Example Answer:Matthew investigated how changes in environmental temperature affected oxygen (O₂) and carbon dioxide (CO₂) levels in the air around a cockroach - VCE - SSCE Biology - Question 11 - 2017 - Paper 1

a. Name the cellular process being investigated in Matthew’s experiment.

b. Identify the dependent variables.

b. Identify the independent variable.

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