Question

how many types of meristematic tissue? what are they?explain them with examples?in big lines please fast urgent
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Answer 1

$\huge{\underlined{\bf{\green{ Meristematic \: Tissues -}}}}$

• Meristematic tissues have the ability to divided, hence they continuously produced new cell which keep differentiating to form specialized cells of the plants.

• Their cells are formed of cellulose.

• These are oval or rounded or polygonal-shaped.

• Meristematic cells are lack of vacuoles.

• They have dense cytoplasm.

• They are thin walled living and isodiametric.

• There is no intracellular space between them.

• They help in growth of the plant.

• Their nuclei acid prominent.

• These are localized in certain Regions.

There are three types of Meristematic tissue -

1. Apical meristem
2. Intercalary meristem
3. Lateral meristem

Answer 2

Answer:

Meristematic tissue : A tissue which consist of dividing cells or the cells having power of cell division is called meristimatic tissue.

• i. The cells of meristematic tissue are living and possess the power of division.

• ii. Each cell contains dense protoplasm and prominent nucleus.

• iii. The cells are small isodiametric, oval or polygonal in shape.

• iv. The cells are compactly arranged without intercellular spaces.

• v. The cell wall is thin, elastic and made up of cellulose.

• vi. It shows the presence of large number of mitochondria. The rate of respiration is very high owing to rapid metabolism.

• vii. They contain few vacuoles or no vacuoles at all.

• viii. Meristematic cells usually divide in a particular plane of division.

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☯ There are 3 types of meristimatic tissue :

i) Apical meristem: These are growing points which are situated at the apices of main as well as secondary root and shoot.

• It divides continuously and brings about growth in length of shoot and root.
• The apical meristem includes promeristem as well as primary meristem.

ii) Intercalary meristem: Intercalary meristems are the parts of apical meristems which get separated from them due to the formation of permanent tissue in between. They are present at the base of internode in grasses and wheat or at the base of node in mint.

• It helps in growth of leaves and internodes.
• In addition, it also plays an important role in prostrate stems to become erect.

iii) Lateral meristem: These meristems are arranged parallel to the sides of the organs or around the central axis of the organ.

• Their activity results in increasing the diameter of plant organs and development of secondary permanent tissues.
• Vascular cambium and cork cambium are the common examples of such meristems.