Question

i) What is the primary function of meristematic tissues?
ii) Which of these meristems is responsible for the secondary growth (growth in thickness of root and shoot) in plants?
iii) Write any two unique features of meristematic tissues.

Answer 1

Answer:

i) Meristematic tissues are responsible for plant growth. They are present at the tips of roots,stem and branches. The cells present in these tissues constantly divide to produce new cells. The cells actively divide to produce new cells.

ii) Apical meristems give rise to the primary plant body and are responsible for the extension of the roots and shoots. Lateral meristems are known as secondary meristems because they are responsible for secondary growth, or increase in stem girth and thickness.

iii) Features of meristematic tissues:

(i) Cells divide repeatedly.

(ii) Cell walls are thin.

(iii) Vacuoles are not found.

(iv) Metabolically very active.

(v) They have dense cytoplasm.

(vi) They have prominent nucleus.

Hope it helps you..

Answer 2

Answer:

i) Meristematic tissues are responsible for plant growth. They are present at the tips of roots,stem and branches. The cells present in these tissues constantly divide to produce new cells. This leads to an increase in the height and girth of plants.

ii) In many vascular plants, secondary growth is the result of the activity of the two lateral meristems, the cork cambium and vascular cambium. Arising from lateral meristems, secondary growth increases the girth of the plant root or stem, rather than its length.

iii) Features of meristematic tissues:

(i) Cells divide repeatedly.

(ii) Cell walls are thin.

:)