Questions and Answers
What does xylem tissue conduct?
What direction does phloem tissue transport food?
What does the vascular cambium produce?
New xylem and phloem cells
Where are the vascular bundles located in dicot stems?
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Where are vascular bundles found in dicot roots?
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What is the main role of xylem?
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What are xylem vessels?
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What is a key characteristic of cell walls in xylem?
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How are vascular bundles arranged in a dicot stem?
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What shape does xylem take in dicot roots?
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Why is transport important in plants?
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What direction does movement occur in the phloem?
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What direction does movement occur in the xylem?
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What substances are transported by phloem?
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What does xylem transport?
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What are phloem vessels made of?
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Study Notes
Xylem Tissue
- Conducts water and dissolved nutrients from roots to leaves in a one-way flow.
- Composed of elongated dead cells called vessels, forming long interconnecting tubes.
- Cell walls are thickened with lignin, providing strength while killing the cell contents.
- Transports water and mineral salts only upwards from roots to leaves.
Phloem Tissue
- Responsible for transporting manufactured food to various plant parts, allowing two-way movement.
- Composed of elongated cells with perforations in end-plates, facilitating flow via translocation.
- Transports substances such as sucrose, water, amino acids, and hormones.
Vascular Cambium
- A meristematic tissue found in dicot plants producing new xylem and phloem cells.
- Contributes to secondary thickening, enhancing stem girth and strength necessary for tall trees.
Structure of Dicot Stems
- Vascular bundles are arranged in a circular pattern around the pith, located near the epidermis.
Structure of Dicot Roots
- Vascular bundles are centrally located, with the xylem forming a rounded 'X' shape and phloem fitting into the indents.
Importance of Transport
- Essential for leaves to receive water and minerals for respiration, and roots to obtain energy for their functions.
Movement Dynamics
- In xylem: movement is strictly from roots to leaves.
- In phloem: movement occurs from the source (where food is produced) to leaves.
Functionality
- Xylem primarily transports water and mineral salts, playing a crucial role in plant hydration and nutrient distribution.
- Phloem is vital for distributing essential nutrients and energy produced during photosynthesis.
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Description
Test your knowledge on the structure and function of xylem and phloem tissues in plants. This quiz covers key definitions and concepts, including the role of vascular cambium. Perfect for biology students looking to reinforce their understanding of plant anatomy.
