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Questions and Answers
Which of the following best describes the role of vascular tissue in plants?
Which of the following best describes the role of vascular tissue in plants?
- It transports substances throughout the plant, including stems, roots and leaves. (correct)
- It protects the plant from external pathogens and herbivores.
- It anchors the plant and absorbs nutrients from the soil.
- It primarily functions in photosynthesis and energy storage.
Xylem and phloem are essential plant tissues. What is the primary function of xylem tissue?
Xylem and phloem are essential plant tissues. What is the primary function of xylem tissue?
- Transporting water and mineral salts from the roots to other plant parts. (correct)
- Facilitating gas exchange and regulating transpiration.
- Transporting soluble food materials, such as sugars and amino acids.
- Providing structural support and protection to the plant.
Phloem tissue transports soluble food materials through the plant. What does this include?
Phloem tissue transports soluble food materials through the plant. What does this include?
- Water and mineral salts
- Lignin and cellulose
- Sucrose and amino acids (correct)
- Carbon dioxide and oxygen
Xylem vessels are adapted to efficiently transport water. What structural feature contributes to this function?
Xylem vessels are adapted to efficiently transport water. What structural feature contributes to this function?
After the cells that form xylem vessels die, their walls become thickened. What is the substance responsible for this thickening?
After the cells that form xylem vessels die, their walls become thickened. What is the substance responsible for this thickening?
In a transverse section of a young dicotyledon stem, where is the vascular cambium located?
In a transverse section of a young dicotyledon stem, where is the vascular cambium located?
How do the thickened walls of xylem vessels enable continuous water flow?
How do the thickened walls of xylem vessels enable continuous water flow?
What is the primary function of the cork cambium found in the transverse section of a woody stem?
What is the primary function of the cork cambium found in the transverse section of a woody stem?
Which of the following describes the arrangement of vascular bundles in a young dicotyledon stem?
Which of the following describes the arrangement of vascular bundles in a young dicotyledon stem?
How do xylem vessels contribute to the overall structural integrity of a plant?
How do xylem vessels contribute to the overall structural integrity of a plant?
Flashcards
Plant Transport
Plant Transport
Substances transported around plants by vascular tissues.
Xylem Function
Xylem Function
Xylem vessels transport water and mineral salts up from the roots.
Phloem Function
Phloem Function
Phloem sieve tubes transport soluble food materials (e.g., sucrose and amino acids).
Epidermis
Epidermis
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Xylem Vessel Structure
Xylem Vessel Structure
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Lignin in Xylem
Lignin in Xylem
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Vascular Tissue
Vascular Tissue
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Cortex
Cortex
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Study Notes
- Substances are transported around plants by vascular tissues of xylem and pholem.
Xylem Tissues
- Consist of xylem vessels
- Transports both water and mineral salts
Phloem Tissues
- Consist of pholem sieve tubes and companion cells
- Transports soluble food materials, like sucrose and amino acids
- Vascular tissues run throughout stems, roots, and leaves.
- Xylem vessels transport water from roots to leaves for photosynthesis purposes.
- Xylem vessels have long, narrow, hollow tubes, are non-living, and are formed by columns of elongated cells.
- When the contents of the cell die, the cross-walls located betwixt adjacent cells in each column breakdown.
- The cellulose walls of the xylem vessel become thickened with lignin in rings, spirals, or a net-like pattern.
- Water flows continuously through the xylem vessels.
- Xylem vessels helps support the plant and are very tough and strong.
- Wood mainly consists of lignified xylem vessels.
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