6 Questions
What is the primary function of xylem vessels in flowering plants?
Transporting water
Through which component do water and minerals primarily travel from the soil to the leaves?
Xylem
Which layer of cells is the outermost in the root?
Epidermis
What is the main characteristic of tracheids?
Have no open ends to form vessels
Which substance in xylem vessels helps in keeping the plant upright?
Lignin
In which form do plants take in minerals?
Inorganic
Study Notes
Xylem Vessels
- Lack cytoplasm and nuclei
- Contain lignin, a hard and strong substance that maintains plant uprightness
- Have unthickened cellulose cell walls with pits
- Responsible for water transport in flowering plants
Tracheids
- Long, thin, spindle-shaped cells with pits
- Allow water flow from one cell to another through pits
- Do not form vessels due to closed ends
- Characterized by pits in their cell walls for water passage
- The sole water-conducting tissue in non-flowering plants
Transport Mechanism
- Epidermis: the single-layered outermost cell layer in the root
- Endodermis: the innermost cortex layer surrounding vascular tissues (xylem and phloem)
- Root Cortex: the cells between the epidermis and endodermis
- Root Xylem: the xylem tissue in roots
- Water must pass through the epidermis, root cortex, and endodermis to reach the root xylem
Minerals
- Plants absorb minerals in their inorganic form as nitrates and phosphates
- Minerals in soil dissolve in water, creating a solution
- When water is transported to leaves, dissolved minerals are also transported
Learn about the structure and function of xylem vessels and tracheids in plant water transport. Understand the role of lignin, cellulose, and pits in these cells.
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