Question

• Difference between tracheids & vessels.
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• Which is not the dead cell amongst these :
a) Tracheids
b) Sieve tubes
c) Vessels
d) Phloem parenchyma
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Answer 1

for the difference between the two I would suggest to refer https://www.majordifferences.com/2013/03/difference-between-tracheids-and-vessels.html?m=1
• cause all I know about the two is that
→tracheids -
› elongated dead cell with thick walls in some place and thin in other
› consist of single cell which is elongated and possess tapering end walls.
› narrow in diameter.
→vessels -
› composed of row of tracheids.
› consist of row of cell placed on one above other in tabular form with total or partial disapperanceof the cross walls.
› diamater is usually much greater than that of tracheids.

• d) phloem parenchyma isn't dead.{that is because they help in transportation}....
hope it helps....
thank u!...

Answer 2

$\huge \underline \mathrm \pink{ANSWER \: - }$

• Cells of tracheids and vessels die at maturity, they have lignified walls, and they are present in primary as well as secondary Xylem. Below are some major differences between tracheids and vessels.

• d) phloem parenchyma

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