Question
Differentiate between tracheids and vessels.
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Tracheids
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Vessels
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Shape & Size
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Tracheids are the long elongated cells.
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Vessels are wider and shorter cells.
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Present
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Tracheids are present in all vascular plants; in gymnosperms, they occur alone in the woody area of the plant while in angiosperms they are associated with vessels.
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Vessels are typically found only in the angiosperms.
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Ability to retain the water
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Tracheids have the higher surface to volume ratio as compared to the vessels that is why they can resist gravity and have the ability to retain the water.
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Lacks ability to retain water.
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Formation
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Tracheids are formed with the division of single individual cells.
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The longitudinal bundle of cells is divided to form vessels.
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Pits
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Tracheids are imperforate cells, which have large pits that are less in number.
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Vessels have smaller pits which are multiple in numbers.
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