Question

Which of the following statement (s) is/ are true?
(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 Quercus suber.

• A. (i) and (iv) only
• B. (ii) and (v) only
• C. (iii) and (iv) only
• D. (ii),(iii) and (v) only

Answer 1

The correct option is A (i) and (iv) only

Sclerenchyma cells are characterized by relatively thick, lignified secondary cell walls. All plant cells initially have only a primary wall made predominantly of cellulose. As sclerenchyma develops, a secondary wall with a high proportion os lignin is deposited inside a primary wall.

So, the correct option is '(i) and (iv) only'.