No ATP needed. Cohesion-Tension that transports the water from the roots to the leaves does not need to consume ATP because the vessels and tracheids are non-living.
The xylem is not needed at maturity because of other methods like transpiration and cohesion. The xylem is part of the dead wood.
To provide strength and rigidity to the plant
To allow water and absorbed minerals to pass through them
Yes
in xylem all the cells R dead IN PHLOEM EXCEPT PHLOEM FIBRES ALL R LIVING CELLS
Generally in trees, the central wood and the bark consist of dead cells.
Xylem is part of the vascular tissue of plants, and the xylem and phloem together are grouped together as the stele (latin for 'pillar'). Xylem tissue is encased in lignin, the substance that creates the strength of wood, causing the protoplasm (living part of the cell) to die, and therefore be dead tissue; phloem is living tissue.
Xylem cells are responsible for supplying water to all parts of the plant. They make up the xylem tube which transports water, but then they die. So the xylem tube which is made up of dead xylem cells is responsible for transport of water in the plant.
No, they are usually living. It is the xylem tissue that is made mostly of dead cells.
xylem
Yes
Yes, phloem is living tissue, xylem tends to be woody and dead.
in xylem all the cells R dead IN PHLOEM EXCEPT PHLOEM FIBRES ALL R LIVING CELLS
Generally in trees, the central wood and the bark consist of dead cells.
Xylem is part of the vascular tissue of plants, and the xylem and phloem together are grouped together as the stele (latin for 'pillar'). Xylem tissue is encased in lignin, the substance that creates the strength of wood, causing the protoplasm (living part of the cell) to die, and therefore be dead tissue; phloem is living tissue.
The dark center of a stem or root that is dead
Xylem
Xylem and phloem, they are two types of vascular tissue.
In Angiosperms , it is xylem vessels ( proto and meta xylem together ) , Xylem sclerenchyma and xylem parenchyma ; together form Xylem tissue ( That is why xylem is called a compound tissue ). In Gymnosperms , xylem vessels are replaced by Xylem tracheids . All other tings are almost the same .
Xylem is part of the vascular tissue of plants, and the xylem and phloem together are grouped together as the stele (latin for 'pillar'). Xylem tissue is encased in lignin, the substance that creates the strength of wood, causing the protoplasm (living part of the cell) to die, and therefore be dead tissue; phloem is living tissue.