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Simple tissues are made of thin cell walls. Complex tissues are made of more than one type of cells.

The following four types of elements make up xylem tissue:

(i) Xylem tracheids (tubular unicellular).

(ii) Xylem vessels (multicellular).

(iii) Xylem parenchyma (stores food and helps in sideways conduction of water).

(iv) Xylem fibres (provide mechanical support).

Tracheids and vessels, xylem parenchyma and xylem fibre all these make up the xylem tissue.

Blood is the connective tissue which transports the oxygen that we inhale to various parts of the body. 

Composition of blood- Blood consist of the fluid matrix which is known as plasma. Cells like red blood cells, white blood cells also remain suspended into it. It also contains platelets.

Collenchyma tissue helps in easy bending of plants. 

Collenchyma cells contain thick deposits of cellulose in their cell walls, which provide strength to the tissue.

Skin: Stratified squamous epithelial tissue

Bark of tree: Simple permanent tissue

Bone: Connective tissue

Lining of kidney tubule: Cuboidal epithelial tissue

Vascular bundle: Complex permanent tissue

1. Skin: Areolar tissue.

2. bark of tree: Epidermis tissue.

3. bone: Tendon tissue.

4. lining of kidney tubule: unstriped muscles.

5. Vascular bundle: Xylem & Phloem.

Cells of cork are dead and compactly arranged without intercellular spaces. They also have a chemical called suberin in the walls that makes them impervious to gases and water.

1 represents axon here through which impulse travels away from the cell body and toward the axon terminals. 

2 and 3 represent dendrite and cell body respectively which do not play role in impulse transmission. 

So, correct option is (a).

When cuboidal epithelial cells start secretion, they are termed as glandular cells. Also, the invasion of the epithelial cells towards the inner side forms sometimes a multicellular gland and in this way, glandular epithelium is formed.

In Columnar epithelial tissue cilia are present.

Role- They helps in the movement of certain substances. For example- Cilia present in the respiratory tract helps in the movement of mucus through it.

The ability to float rather than being submerged in water in aquatic plants comes due to the presence of a special tissue called aerenchyma which is a subtype of parenchymatous tissue. In this tissue large air cavities are present between parenchyma to give buoyancy to the plants which help them to float rather than being submerged.

(i) Meristematic tissue have very active cells with dense cytoplasm and a prominent nuclei.

(ii) Schlerenchyma tissue lack vacuoles and intercellular spaces.

The growth of plants occur in speciic regions due to the presence of meristematic tissue in those speciic regions because the meristematic tissue is the one which is responsible for the division in plants. The areas where this meristematic tissue is present like the tip of roots, stem, at the bases of leaves, internodes etc growth occur there only. In other regions the meristematic tissue is absent. So, Growth occurs only in certain speciic regions.

Roots and stems.

Leaves, fruits, and flowers are the regions where the parenchyma tissue is present.

Phloem ibers provide mechanical strength to this tissue.

Parenchyma, collenchyma and sclerenchyma are the three types of simple tissues.

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

Sclerenchyma tissue makes up the husk of coconut.