Question

define 3 types of meristematic tissue?

Answer 1

Here's the answer

Meristematic tissue 

Meristematic tissue is the only plant tissue that produces new cells by cell division. These cells are thin walled with conspicuous nucleus and they divide rapidly. 

Depending upon the region where they are situated , meristematic tissue are classified as :

✔️ 1. Apical Meristem 
✔️ 2. Lateral Meristem
✔️ 3. Inter-calary Meristem

1. Apical Meristem =>

Apical Tissue is located at the growing tips of stems and roots. It enables the root or stem to grow in length.

2. Lateral Meristem => 

Lateral Meristem is also called as Cambium.
The girth and width of the stem or the root increases due to lateral meristems.

3. Inter-calary Meristem

Inter-calary Meristem is present at the base of the leaves , at the nodal region of the twigs.
The cells of this tissue have dense cytoplasm, thin cellulose walls and prominent nuclei. These cells are very active.

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Thanks!!

Answer 2

"MERISTEMATIC TISSUE"
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=> it is found in the growing regions of the plant. As, growth of plants occurs only in a certain specific regions. This is because dividing tissue, known as MERISTEMATIC tissue!

$\textbf{It is classified as}$ :-

$\textbf{(1) APICAL MERISTEM :-}$

• it is present at the growing tips of stems and roots and increases the length of the stem and root.

• it is found in root and shoot tips.

• responsible for unilateral growth.

$\textbf{(2) LATERAL MERISTEM :-}$

• The girth(width) of the stem or root increases due to lateral meristem (cambium).

• so, they are responsible for secondary growth of the plant

• this secondary growth is caused by cell division in the Lateral Meristem and is mostly exhibited by dicot plants.

$\textbf{(3) INTERCALARY MERISTEM :-}$

• it is the Meristem at the base of the leaves or internodes ( on either side of the node) on twigs.

• it helps in rapid stem elongation.

• for example , it is found in BAMBOO.