Question

Pick the correct statements. a) Apical meristem increases the girth of the plant b) Secondary meristem appears late, in a plant’s life c) Collenchyma tissues show irregular thickenings due to the deposition of pectin. d) Parenchyma tissues have lignified walls

(b) and (c)
(b) and (d)
(a) and (c)
(a) and (d)​

Answer 1

Answer:

Plant tissues may be meristematic or permanent.  

Permanent tissues may be simple, made up of a single type of cells (parenchyma, collenchyma and sclerenchyma) or complex, made up of cells of more than one type (xylem and phloem). Parenchyma cells are thin walled and have intercellular spaces. Collenchyma cells have thickenings of cellulose and pectin at the corners.

Meristematic tissues are made up of continuously dividing cells and permanent tissues are made of non-dividing cells. They include Apical, intercalary and lateral meristems. One important characteristic of the rapidly dividing cell is the lack of vacuoles.

Hence 'C' is the right option because apical and intercalary meristems are not permanent tissues.

Explanation: