Xylem

• Where is xylem tissue found in plants?


  Xylem tissue is found in the roots, stem, and leaves.
• What is the role of xylem tissue in plants?


  Xylem tissue forms part of the plant organ system for transport.
• What does a cross-section of a stem show regarding xylem tissue?


  • Xylem tissue is shown in red.
  • It is found in bundles throughout the stem.
• How do water and mineral ions enter the plant?

  Water and mineral ions move from the soil into the plant via the roots.
• What is an example of a mineral ion that moves into the plant via the roots?

  Magnesium is an example of a mineral ion that moves into the plant via the roots.
• What are the functions of the water and mineral ions transported by xylem tissue?


  They are used for photosynthesis and growth.
• In which direction are water and mineral ions transported in xylem tissue?


  They are transported in one direction, up the plant.
• What does xylem transport from the roots to the rest of the plant?

  Xylem transports water and mineral ions from the roots up to the stems and leaves.
• What is the composition of xylem tissue?


  Xylem tissue is made up of dead cells that have lost their end walls and formed a hollow tube.
• What strengthens xylem tissue?


  Xylem tissue is strengthened by lignin.
• Why do xylem cells have no end walls?


  No end walls make the xylem a hollow vessel.
• What is lignin and its role in xylem tissue?


  Lignin is a very stiff and strong polymer that strengthens the xylem cells.
• How do the features of xylem tissue adapt it for its function?


  The hollow tube structure and lignin strengthening allow water and mineral ions to be efficiently transported up the plant.
• What is the main function of xylem in plants?


  • Transports water and mineral ions
  • Moves them from roots to stems and leaves
• What are the key features of xylem tissue?


  • Composed of dead cells
  • No end walls, forming a hollow tube
  • Strengthened by lignin
• How does xylem tissue facilitate water transport?


  • Hollow structure allows for easy flow
  • Lignin provides strength to withstand pressure
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