The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less.  Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm.   B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm.

Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less.  Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm.  


B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm.  Provide one reason why this does NOT happen to the C4 plant.  

Question 3.
60+
50+ C4 PLANT
8 40-
C3 PLANT
30+
20
10+
-10
200
400
600
800
CO2 CONCENTRATION, ppm
Photosynthesis occurs in both C3 and C4 plants. An experiment was conducted to compare the
uptake of CO2 in both types of plants in different concentrations of ambient CO2.
PHOTOSYNTHESIS, µmol Co, m-2 s-1
Transcribed Image Text:Question 3. 60+ 50+ C4 PLANT 8 40- C3 PLANT 30+ 20 10+ -10 200 400 600 800 CO2 CONCENTRATION, ppm Photosynthesis occurs in both C3 and C4 plants. An experiment was conducted to compare the uptake of CO2 in both types of plants in different concentrations of ambient CO2. PHOTOSYNTHESIS, µmol Co, m-2 s-1
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