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प्रश्न
State the location and function of different types of meristems.
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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
संबंधित प्रश्न
Where is apical meristem found?
State whether the following statement is True or False.
Meristematic tissue is found at the growing tips of a plant.
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 a short note.
Meristematic tissue
Name the kind of tissue found at the tip of plant roots.
Name the kind of tissue found in the walls of the veins of the leaves.
Write one word for the following:
Cells least specialized in plants.
Name one place in living organisms where the following tissue is located:
Meristematic tissue
List the tissues found in the human heart.
Aerenchyma is found in ______.
What are intercalary meristems? How do they differ from other meristems?
Refer to the given figure and select the correct statement.
- A, B, and C are histogen of shoot apex
- A Gives rise to medullary rays.
- B Gives rise to cortex
- C Gives rise to epidermis.
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?
Meristematic tissues in plants are
Survival of plants in terrestrial environment has been made possible by the presence of
Which structure protects the plant body against the invasion of parasites?
Define the process of differentiation
Bamboo, grass and mint stem elongate by the activity of
The lawn grass (Cynodon dactylon) needs to be mowed frequently to prevent its overgrowth. Which tissue is responsible for its rapid growth?
