Photosynthesis Pathways and Efficiency
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Objective
I can evaluate the efficiency of different photosynthetic pathways in diverse environmental conditions.
Part 1 of 3
Key concepts
3 concepts
- 1
The three main photosynthetic pathways are C3, C4, and CAM, each adapted to different environmental conditions.
- 2
C4 photosynthesis minimizes photorespiration by spatially separating initial CO₂ fixation and the Calvin cycle, making it more efficient in hot, dry environments.
- 3
CAM photosynthesis separates CO₂ fixation and the Calvin cycle temporally, opening stomata at night to conserve water, but resulting in slower growth compared to C3 and C4 plants.
Part 2 of 3
Practice
3 questions
Compare and contrast the environments in which C3, C4, and CAM plants thrive. Explain the specific adaptations that make each pathway advantageous in its respective environment.
A farmer is considering growing crops in a hot, arid climate with intense sunlight. Which photosynthetic pathway (C3, C4, or CAM) would be most suitable for the crops, and why?
Part 3 of 3
Exit ticket
Quick comprehension check
“Describe a scenario where a C4 plant would be more efficient than a C3 plant, and explain why.”
Sample answer included in the free materials
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