Which of the following statement(s) is/are correct (i) Uneven thickening of cell wall is charact...

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Which of the following statement(s) is/are correct
(i) Uneven thickening of cell wall is characteristic of sclerenchyma
(ii) Periblem forms cortex of the stem and the root
(iii) Tracheids are the chief water transporting elements in gymnosperms
(iv) Companion cell is devoid of nucleus at maturity
(v) The commercial cork is obtained from emQuercus suber/em
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