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प्रश्न
State the location and function of different types of meristems.
उत्तर
Meristems are specialised regions of plant growth. The meristems mark the regions where active cell division and rapid division of cells take place. Meristems are of three types depending on their location.
Apical meristem
It is present at the root apex and the shoot apex. The shoot apical meristem is present at the tip of the shoots and its active division results in the elongation of the stem and formation of new leaves. The root apical meristem helps in root elongation.
Intercalary meristem
It is present between the masses of mature tissues present at the bases of the leaves of grasses. It helps in the regeneration of grasses after they have been grazed by herbivores. Since the intercalary meristem and the apical meristem appear early in a plant’s life, they constitute the primary meristem.
Lateral meristem
It appears in the mature tissues of roots and shoots. It is called the secondary meristem as it appears later in a plant’s life. It helps in adding secondary tissues to the plant body and in increasing the girth of plants. Examples include fascicular cambium, interfascicular cambium, and cork cambium
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संबंधित प्रश्न
How is meristematic tissue different from permanent tissues?
What is the function of meristematic tissue?
Fill in the blank
......................... tissue is situated at the tip of root and stem.
Write a short note on intercalary meristem.
What are meristematic tissues? Explain with the help of suitable diagram. Give their classification on the basis of their position in the plant body.
Write the name of the following tissue.
Tissue is responsible for increasing the height of plants.
Write the name of the following tissue.
Tissue is responsible for increasing the girth of the stem.
Name one place in living organisms where the following tissue is located:
Meristematic tissue
Define the following:
Meristematic tissue
Aerenchyma is found in ______.
Read the following sentences and identify the correctly matched sentences.
- In exarch condition, the protoxylem lies outside of metaxylem.
- In endarch condition, the protoxylem lie towords the centre.
- In centarch condition, metaxylem lies in the middle of the protoxylem.
- In mesarch condition, protoxylem lies in the middle of the metaxylem.
Which cell does not have perforated cell wall?
A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible reason?
Cartilage is not found in
Nervous tissue is not found in
Parenchyma cells are
______ is derived from the ground meristem.
Bamboo, grass and mint stem elongate by the activity of
Match List - I with List - II.
| List - I | List - II | ||
| (a) | Cells with active cell division capacity |
(i) | Vascular tissues |
| (b) | Tissue having all cells similar in structure and function |
(ii) | Meristematic tissue |
| (c) | Tissue having different types of cells |
(iii) | Sclereids |
| (d) | Dead cells with highly thickened walls and narrow lumen |
(iv) | Simple tissue |
Select the correct answer from the options given below.
The lawn grass (Cynodon dactylon) needs to be mowed frequently to prevent its overgrowth. Which tissue is responsible for its rapid growth?
