Question

meristematic tissue​

Answer 1

Answer:

A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of a plant and are responsible for growth.

Differentiated plant cells generally cannot divide or produce cells of a different type. Meristematic cells are incompletely or not at all differentiated, and are capable of continued cellular division. Therefore, cell division in the meristem is required to provide new cells for expansion and differentiation of tissues and initiation of new organs, providing the basic structure of the plant body. Furthermore, the cells are small and protoplasm fills the cell completely. The vacuoles are extremely small. The cytoplasm does not contain differentiated plastids (chloroplasts or chromoplasts), although they are present in rudimentary form (proplastids). Meristematic cells are packed closely together without intercellular cavities. The cell wall is a very thin primary cell wall as well as some are thick in some plants.[citation needed] Maintenance of the cells requires a balance between two antagonistic processes: organ initiation and stem cell population renewal.[citation needed]

There are three types of meristematic tissues: apical (at the tips), intercalary (in the middle) and lateral (at the sides). At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone. Cells of this zone have a stem cell function and are essential for meristem maintenance. The proliferation and growth rates at the meristem summit usually differ considerably from those at the periphery.

Answer 2

Good Morning Bro,

See the answer Below Mate :-

#Definition :-

=>It is for plant growth.

=>It has the ability to divide and redivide to provide growth to plants.

=>Meristematic cells give rise to various organs of a plant and are responsible for growth.

#Characteristics of Meristematic tissue :-

=>They are composed of immature cells.

=>Absence of intercellular spaces.

=>Cells are oval, rounded or polygonal in shape.

=>Cells are always living and thin walled.

=>Cells are rich in cytoplasm with minute vacuoles.

=>Cell is diploid and shows mitotic cell division.

=>Cell is devoid of reserve food materials, ER and plastids.

#Functions of Meristematic Tissue :-

1. Meristems are actively dividing tissues of the plant.

2. They are responsible for primary (elongation) and secondary (thickness) growth of the plant.

3. All new organs and their growth occur by the division of meristematic tissue.

4. Secondary tissues such as, wood, cork are also formed due to activity of meristematic tissue

#Location of Meristemetic tissue :-

Meristematic tissues are found in apical regions--

1)The tips of root.

2)Shoots.

3)Leaf.

4)Flower bud.

#Structure of Mersitematic Tissue :-

1)It is known as undifferentiated tissue because cells in the meristematic tissue will eventually become vascular, ground, or dermal tissue.

2)Plants generally grow where meristematic tissue is present.

3)At the tips of roots and stems, the meristematic tissue is called the apical meristem.

#Meristematic cells found in :-

Meristems are classified by their location in the plant as apical (located at root and shoot tips), lateral (in the vascular and cork cambia), and intercalary (at internodes, or stem regions between the places at which leaves attach, and leaf bases, especially of certain monocotyledons—e.g., grasses).