May 2021 2 79 Report
Two different plants were placed in sealed jars under a light.?

Probes were inserted into the jars to track O2 and CO2 levels. What can be concluded from the following data?

Plant A- 0 min 5 min 10 min 15 min

%CO2 - 0.09 0.03 0.02 0.02

%O2- 18.15 18.23 18.25 18.25

Plant B- 0 min 5 min 10 min 15 min

%CO2- 0.09 0.02 0.01 0.005

%O2 - 18.15 18.25 18.27 18.27

a. Plant A is receiving less light than Plant B and is performing photosynthesis slower.

b. Plant A is a C4 plant. Plant B is a CAM plant.

c. Plant A is smaller than Plant B and has fewer leaves to perform photosynthesis.

d. Plant A is smaller than Plant B and uses up the supply of CO2 slower.

e. Plant A is performing photorespiration. Plant B is a C4 plant.


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