Question

Chapter - Tissues (Plant Tissue)
Worksheet
1. what are the main characteristics of the cells of merinematic issues?
2.Name the meristems responsibic for inc primary and secondary growth of
plaats.
3. On the basis of location and fuoction differentiate between pical, Intercalary
and lateral meristem
4. Why are dermal tissues relerred as protective issues ?
5. Differentiate between
a) Meristematic and Permanent tissue (4 points)
b) Parenchyma, Collenchyma and Sclerecchyma (4 points)
& Give reasons:
a) Why Dre Xylem and Phloem called conducting lissue?
b) Why is Xylem tissue present in the plants?
7. Differentiate between Xylemn and Phloem (3 points)
& Name the four diferent types of cells present in Xylem and Phloem
9. Name the only living tissue present in Xylem.
10. Discuss the fundion of phloen in plants
11 Draw diagrams showing
1 Apical, Intercalary and Lateral meristem
2. Parenchyma, Calienchyma und scierenchyma tissue
​

Answer 1

Answer:

Q1.

Meristematic tissue is the plant tissue that has the ability to divide actively throughout its life.

The characteristics of meristematic tissue are as follows:

1. The cells of these tissues are commonly called meristems.
2. The meristematic tissue has the quality of self-renewal. Every time the cell divides, one cell remains identical to the parent cell, and the others form specialized structures.
3. They have very small and few vacuoles.
4. The meristematic tissue is living and thin-walled.
5. The protoplasm of the cells is very dense.
6. The meristematic tissues heal the wounds of an injured plant.
7. The cells of the meristematic tissue are young and immature.
8. They do not store food.
9. They exhibit a very high metabolic activity.
10. They possess a single, large and prominent nucleus.

Q2.

    Apical meristems, that are located at the tips of the roots and shoots, are         responsible for primary growth. Secondary growth allows for the plant to grow into thickness. Lateral meristems known as the vascular cambium and cork cambium are responsible for secondary growth.

Q3.

Meristematic tissues are mainly of three types namely apical, intercalary and lateral. The key difference between apical intercalary and lateral meristem is their location. Apical meristem positioned at the root and shoot tips while intercalary meristem and lateral meristem positioned at internodes and lateral surfaces of the shoot and root. Another difference between apical intercalary and lateral meristem is the functional role they play within the plant. Apical meristem and intercalary meristem contribute to the increased plant height while lateral meristem increases the thickness of the plant. (I have uploaded a tabular below)

Q4.

Primary dermal tissues, called epidermis, make up the outer layer of all plant organs (e.g., stems, roots, leaves, flowers). They help deter excess water loss and invasion by insects and microorganisms. Epidermis is called protective tissue because it forms the outermost covering of a plant which protects the plants from different harmful causes.

Q5.

(a) A cluster of cells, performing similar functions are known as tissues. In plants, tissues are classified broadly into two groups on the basis of cell division capacity, namely – Meristematic and Permanent Tissue. Meristematic tissues in plants consist of a mass of undifferentiated cells whose main function is to participate in plant growth.

Permanent tissues, on the other hand, are differentiated tissues, carrying out dedicated functions. Some of which is to conduct, render mechanical strength to the plant or even to carry out photosynthesis. These tissues are originated, differentiated and derived from meristematic tissues. (I have uploaded the table below)

(b) Simple tissues are of three types, namely parenchyma, collenchyma and sclerenchyma.

Parenchyma – They are living cells and walled, soft in nature due to the presence of thin-walled cells

Collenchyma – These are characterized by uneven thick-walled living cells.

Sclerenchyma – They have cells with thickened lignified walls, providing them strength and making them waterproof.

(I have uploaded the table below)

Q6.

(a) Xylem and Phloem are called conducting tissues as they are involved in the conduction of water and the food. Xylem -conducts water absorbed by the roots to different parts of the plant. Phloem - conducts food prepared in the leaves to various parts of the plant.

(b) The vascular tissues of plants, which are composed of specialized conducting tissues, xylem and phloem, form continuous systems through the plant body and provide transport pathways for water, nutrients, and signaling molecules and support a plant body against mechanical stresses.

Q.7 (I have uploaded the table below)

Q.8 Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells. Xylem: tracheids, trachea, and xylem fibre and xylem parenchyma.

Q9. Parenchyma cells are the only living cells in the xylem.

Q10. Provides a passage for the downward movement of food manufactured in the leaves to various parts of the plant. It also allows the upward movement of the prepared food towards the growing new leaves.

Q11.

1. (I have uploaded the picture below)

2. (I couldn't upload the last image because only five images can be uploaded in a question. You can find the image on G00GLE)

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