2. Find out incorrect sentence
(a) Parenchymatous tissues have intercellular spaces
(b) Collenchymatous tissues are irregularly thickened at corners
(c) Apical and intercalary meristems are permanent tissues
(d) Meristematic tissues, in its early stage, lack vacuoles
3. Girth of stem increases due to
(a) apical meristem (b) lateral meristem (c) intercalary meristem
4. Which cell does not have perforated cell wall?
(a) Tracheids
(b) Companion cells (c) Sieve tubes
5. Meristematic tissues in plants are
(a) localised and permanent
(b) not limited to certain regions
(c) localised and dividing cells
(d) growing in volume
(d) vertical meristem
(d) Vessels
Answers
Answer:
Explanation:
2. The Incorrect One is Option (C)......
Apical and Intercalary Meristems are Meristematic Tissues.......
3. Girth of stem increases due to Lateral meristems (b).........
4. The cell wall not perforated in Tracheids (a)............
5. The characteristics of Meristematic tissues in plants are localized and dividing (c)............
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Answer:
1. OPTION (C) Apical and intercalary meristems are permanent tissues.
This statement is incorrect because apical and intercalary meristems are meristematic tissues.
2. OPTION (B) Lateral meristems.
The girth of the stem increases due to lateral meristematic tissues. These are usually found beneath the bark (cork cambium) as well as in the vascular bundles of dicot roots and stems (vascular cambium) in the form of thin layers which eventually increases in the diameter and girth of the plant as secondary growth.
3. OPTION (A) Tracheids
Tracheids do not have a perforated cell wall. They have pits in their cell wall but lack pores. These pits are often confused with pores but it is barely a thinned-out cell wall. Hence, tracheids do not have a perforated cell wall.
4. OPTION (C) localized and dividing cells
Meristematic tissues in plants are localized and dividing cells. This is one of the fundamental characteristics of meristematic tissues.
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