Xylem tissues are composed of dead cells called xylem vessels and tracheids. If they are "dead", how can they perform their function of transporting water and minerals upward throughout the concerned plant? Thank you! :)

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Solution

Yes the majority of xylem tissue is dead and lignified. The main function of xylem is to build a pipeline like netwirk through which water can rise up. It needs to be strong and supported which is there because of lignin. Regarding water and minerals transport , that is brought about by osmotic pressure and transpiration pull generated due to transpiration. Xylem elements do not have to pump the water up.

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How does tracheids and vessels transport water and minerals when they are dead

Q. Why are xylem and phloem called complex tissues. How are they different from one other?

Q. Conducting cells called ________ elements are the part of xylem where water and minerals are transported.

Q. Plant cells responsible for the transport of water are dead when they are mature enough to act as water transport tissues. These cells include which of the following cell types?
I. Tracheids
II. Vessel elements
III. Sieve tube members
IV. Companion cells

Which of the following statements are correct?

(i) Companion cells are present in phloem.
(ii) Xylem transports water and minerals from roots to other parts of the plant.
(iii) Vessels of xylem are present in all plants.
(iv) Both xylem parenchyma and phloem parenchyma have nucleus.

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