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Questions and Answers
What is the outermost layer of cells of a leaf called?
What is the outermost layer of cells of a leaf called?
- Spongy layer
- Epidermis (correct)
- Cuticle
- Palisade layer
Where does photosynthesis mainly take place in a leaf?
Where does photosynthesis mainly take place in a leaf?
Palisade layer
The ______ carry food and water to the cells.
The ______ carry food and water to the cells.
veins
Photosynthesis occurs in leaves to produce oxygen.
Photosynthesis occurs in leaves to produce oxygen.
What gas is needed for photosynthesis?
What gas is needed for photosynthesis?
What is the green pigment required for photosynthesis?
What is the green pigment required for photosynthesis?
What do guard cells control?
What do guard cells control?
What are the small openings in leaves that allow the exchange of gases called?
What are the small openings in leaves that allow the exchange of gases called?
Which organelles contain chlorophyll?
Which organelles contain chlorophyll?
What is the layer beneath the palisade layer called?
What is the layer beneath the palisade layer called?
What is the final product of photosynthesis?
What is the final product of photosynthesis?
What is the waxy outer covering of the leaf known as?
What is the waxy outer covering of the leaf known as?
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Study Notes
Leaf Structure and Function
- Epidermis: Outermost cell layer of a leaf providing protection.
- Cuticle: Waxy outer layer that minimizes water loss and protects the leaf.
- Palisade Layer: Key site for photosynthesis, situated beneath the epidermis; contains tightly packed cells for maximum light absorption.
- Spongy Layer: Located beneath the palisade layer, this layer has air spaces to facilitate gas exchange.
Photosynthesis Process
- Photosynthesis: Chemical process utilized by plants to convert sunlight into sugar using carbon dioxide and water.
- Chlorophyll: Green pigment in chloroplasts essential for capturing light energy during photosynthesis.
- Chloroplasts: Organelles within plant cells where photosynthesis occurs; contain chlorophyll.
- Glucose: Main product of photosynthesis, serving as an energy source for the plant.
Gas Exchange and Nutrient Transport
- Stomata: Small openings on leaf surfaces that enable gas exchange; allow entry of carbon dioxide and exit of oxygen.
- Guard Cells: Specialized cells surrounding stomata that regulate their opening and closing to control gas exchange and water loss.
- Veins: Vascular structures in leaves that transport water and nutrients from roots to cells and distribute sugars produced during photosynthesis throughout the plant.
Essential Gases
- Carbon Dioxide: Gas that is a critical reactant in the photosynthesis process, taken in through stomata.
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