Which of the following is the only conducting tissue in non-flowering plants ?
(a) xylem vessels
(b) sieve tubes
(c) companion cells
(d) tracheids

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Solution

option (d) tracheids

Innon-flowering plants tracheids are the only water conducting tissues Tracheids are dead cells with lignified walls with no open ends. They are long, thin and spindle shaped cells. They have pits in them and it is through pits only that water flows from one tracheid to another. All the plants have tracheid in them.

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(b) Sieve tube
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(b) sieve tube
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Question 4
Which cell does not have perforated cell wall?

(a) Tracheids
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(c) Sieve tubes
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What substance/substances are transported in plants by :
(a) xylem vessels and tracheids ?
(b) sieve tubes (or phloem) ?

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