Lab Students Placed Ten Spinach Leaf Disks in Each of Three

Lab students placed ten spinach leaf disks in each of three test tubes containing a baking soda solution and a control tube without baking soda. The volume of liquid in each tube and the temperature of the solutions were held constant. All tubes were placed an equal distance from a light source as indicated in the accompanying table. After 10 minutes, the amount of oxygen present in each sample was measured.

Which tube is expected to contain the greatest quantity of oxygen?

A) Tube 1
B) Tube 2
C) Tube 3
D) Tube 4

Correct Answer:

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