Describe the structure of the cells that make up the xylem.
The xylem is made up of large cells with thick cell walls. The cell walls are made up of lignin and microfibrils giving the xylem vessels great strength.
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Describe the arrangement of cells in the xylem.
The large xylem cells are arranged in a column, this forms a tube for the vertical transport of water and mineral ions.
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How does the plant make the cell wall waterproof?
In order for the cell wall to be waterproof, the plant produces the polymer lignin.
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How do the xylem cells create a hollow tube for the transport of water?
In order to create a hollow tube, a process called autolysis occurs.
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What is autolysis?
During autolysis the xylem vessel’s cell organelles die and break down. This leaves a hollow, water-filled cavity.
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Can water only move vertically in the xylem vessels?
Water is able to move both vertically and horizontally. Pits in the wall of xylem vessels allow the horizontal movement of water between xylem vessels.
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Other cards in this set
Card 2
Front
Describe the arrangement of cells in the xylem.
Back
The large xylem cells are arranged in a column, this forms a tube for the vertical transport of water and mineral ions.
Card 3
Front
How does the plant make the cell wall waterproof?
Back
Card 4
Front
How do the xylem cells create a hollow tube for the transport of water?
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