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Question: How does the concentration of carbon dioxide affect the rate of
photosynthesis in tomato plants?
Rate of Photosynthesis
Background Research: Photosynthesis is the process by which plants, as well as some
fungi, bacteria, and protists, use light energy, carbon dioxide, and water to make
glucose (food); oxygen is also released as a by-product. This reaction causes light
energy to be transformed into chemical energy that can be used or stored by the
organism. Photosynthesis is one of the most important parts of the carbon cycle,
allowing carbon to cycle through many different processes and spheres on Earth.
In order to study the specific effects of carbon dioxide concentration on the rate of
photosynthesis, scientists grew and studied tomato plants within a greenhouse where
they could control the concentration of carbon dioxide. Below is a model of their data:
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Rate of Photosynthesis vs. Concentration of Carbon Dioxide
V increases
B
C
x increases
Carbon Dioxide Concentration
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