6 Questions
What is the main function of stomata in plant leaves?
To regulate gas exchange and water loss
What is the role of guard cells in stomata?
To regulate the opening and closing of stomata
What is the function of chlorophyll a in photosynthesis?
To absorb light energy for the light-dependent reactions
Why do plants appear green?
Because they absorb light in the blue and red parts of the spectrum
What is the role of chlorophyll b in photosynthesis?
To transfer light energy to chlorophyll a
What is the purpose of chlorophyll c in algae and cyanobacteria?
To absorb light energy for photosynthesis in specific organisms
Study Notes
Photosynthesis
Stomata
- Small openings on the surface of plant leaves that allow for gas exchange
- Found on the underside of leaves, typically in clusters
- Consist of:
- Guard cells: special cells that surround the stoma and regulate its opening and closing
- Stoma: the small pore that allows for gas exchange
- Function:
- Allow CO2 to enter the leaf for photosynthesis
- Allow O2 to exit the leaf as a byproduct of photosynthesis
- Regulate water loss through transpiration
Chlorophyll
- Green pigment found in plants, algae, and cyanobacteria
- Responsible for absorbing light energy for photosynthesis
- Characteristics:
- Absorbs light in the blue and red parts of the visible spectrum
- Reflects light in the green part of the spectrum, giving plants their green color
- Types:
- Chlorophyll a: the most important form of chlorophyll, involved in the light-dependent reactions of photosynthesis
- Chlorophyll b: accessory pigment that absorbs light energy and transfers it to chlorophyll a
- Other forms of chlorophyll: found in specific organisms, such as chlorophyll c in algae and cyanobacteria
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