PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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water flow is not slowed down
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it forms an empty tube for water to flow through
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water and minerals can enter and leave the cells
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None of the above
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Detailed explanation-1: -The cells have no organelles or cytoplasm, which creates more space inside the vessel for transporting water.
Detailed explanation-2: -Their cytoplasm is highly reduced and they only perform the function of conduction. The xylem tissues also lack cell organelles. Therefore, they are considered dead.
Detailed explanation-3: -The most dramatic developmental consequence of the xylem is that some xylem cells lose their cytoplasm completely to become dead cells to perform transport functions. These are tracheids found in gymnosperms and some primitive angiosperms and vessels in advanced angiosperms.
Detailed explanation-4: -Mature xylem vessels: contain no cytoplasm. are impermeable to water. have tough walls containing a woody material called lignin.