16 Questions
What is the main function of the dermal tissue or epidermis in herbaceous plants?
Gas exchange and protection from diseases
What is the function of the stomata in the epidermis of leaves?
Entrance and exit for gas exchange
What role do the guard cells play in the epidermis of leaves?
Regulating the opening and closing of stomata
Where does photosynthesis primarily occur in a leaf?
Mesophyll
What is the main function of the ground tissue or mesophyll in a plant leaf?
Food and water storage, and photosynthesis
What is the specialized function of palisade tissue within the mesophyll of a leaf?
Upper part of mesophyll involved in photosynthesis
Which type of tissue is responsible for the transfer of water and dissolved minerals up from the roots to the stem and leaves?
Xylem tissue
What is the function of phloem tissue in plants?
Takes sugar from the source to the sink
Where is the spongy tissue located within the plant?
Lower part of mesophyll
What creates pulls on adjacent water molecules, aiding in the transport of water in plants?
Transpiration pressure
Which type of tissue moves sucrose and other dissolved sugars throughout the plant?
Phloem tissue
What is responsible for pushing water up the xylem from the roots to the leaves?
Root pressure
Where are chloroplasts in a plant cell found in the largest amount?
Mesophyll cells
What does phloem take from the leaves to be transported throughout the plant?
Sucrose and other dissolved sugars
Which type of pressure forces fluids up the xylem from higher pressure in the roots towards lower pressure in the leaves?
Root pressure
What is responsible for moving water and dissolved minerals up from the roots to the stem and leaves?
Xylem Tissue
Study Notes
Epidermis and Stomata
- The main function of the dermal tissue or epidermis in herbaceous plants is to protect the plant from water loss and pathogens.
- Stomata in the epidermis of leaves allow for gas exchange, specifically CO2 uptake and O2 release, during photosynthesis.
- Guard cells in the epidermis of leaves regulate stomatal opening and closing, controlling gas exchange and water loss.
Photosynthesis and Mesophyll
- Photosynthesis primarily occurs in the mesophyll tissue of a leaf, specifically in the chloroplasts.
- The main function of the ground tissue or mesophyll in a plant leaf is to carry out photosynthesis.
- Palisade tissue within the mesophyll is specialized for photosynthesis, with tightly packed chloroplasts to maximize light absorption.
Xylem and Phloem
- Xylem tissue is responsible for the transfer of water and dissolved minerals up from the roots to the stem and leaves.
- Phloem tissue is responsible for moving sucrose and other dissolved sugars throughout the plant.
- Root pressure is responsible for pushing water up the xylem from the roots to the leaves.
Transportation and Pressure
- Cohesion tension, where water molecules pull on adjacent molecules, aids in the transport of water in plants.
- Transpiration pull, a type of pressure, forces fluids up the xylem from higher pressure in the roots towards lower pressure in the leaves.
Chloroplasts and Spongy Tissue
- Chloroplasts are found in the largest amount in the mesophyll tissue of a leaf.
- Spongy tissue is located in the interior of the leaf, allowing for gas exchange and photosynthesis.
Phloem Functions
- Phloem takes sucrose and other dissolved sugars from the leaves to be transported throughout the plant.
Test your knowledge about the dermal tissue and epidermis of herbaceous plants. This quiz covers the functions of the outer layer of cells, such as gas exchange, protection from diseases, and secretion of the cuticle.
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