Complex tissues: These tissues are made up of more than one type of cell. These cells work like a unit. Major examples of complex tissue are Xylem and Phloem (Vascular tissues).

Meristem culture is used to obtain virus-free plants because the meristematic region of the plant is usually free from virus infection.

Areolar connective tissue is found in all four options provided in the question (between skin and muscles, between internal organs, around blood vessels, and in bone marrow). Therefore, the answer marked is (*) as areolar tissue is present in all these locations.

In tissue culture technique, new plants are grown by isolating plant tissue or cells from the growing tip of the plant. These cells are placed in an artificial nutrient medium where the cells divide to form a small group of many cells, which is called callus.

Goblet cells are secretory epithelial cells found in both small and large intestines. The primary function of these cells is to secrete mucus and form a protective mucus layer.

The lining of renal tubules and salivary gland ducts is formed by Cuboidal Epithelium tissue, which provides mechanical support and protects them from various types of injuries.

Groups of cells that are similar in structure, shape, origin, and function are called 'Tissue'.

The term 'Tissue' was first used by the French physiologist Bichat in the 18th century in the context of anatomy.

Chondrocytes are cells formed from Chondroblast cells in the Perichondrium found in cartilage. Adipose tissue is made up of fat cells and other cells and fibers. Voluntary muscle fibers are micro-muscle fibers (Myofibrils) found in the sarcoplasm that remain arranged parallel to each other in a repeated sequence. Axon is a process found in a nerve cell that carries sensations away from the cell body. The fibrous connective tissue by which bone is covered is called Periosteum.

Phloem is a vascular tissue found in plants. It transports food and nutrients from the leaves to storage organs and growing parts of plants.

Suberin is a waxy substance that deposits in the walls of cork cells and makes them impermeable to water and gases. It forms a protective layer for the plants.

Organ: When different types of tissues work together to perform a specific function, that structure is called an organ.

Stem cells are cells that have the extraordinary ability to develop into any type of cell in the body. These are primitive and immature cells.

Stem cells are cells that have the ability to develop into any type of cell in the body. These cells are found not only in the embryo but also in adult tissues (such as bone marrow). Therefore, the statement 'They are found only in the embryo' is false.

In the shotgun method, micro-particles of gold or tungsten coated or embedded with desired $DNA$ are fired into target cells at high velocity with the help of a projectile, allowing the $DNA$ to enter the cell.

Water transport in plants occurs through xylem tissue.

Simple tissues: These tissues are composed of only one type of cell. They are found as a homogenous group. There are three types: Parenchyma, Collenchyma, and Sclerenchyma. Xylem and Phloem are complex tissues.

Xylem is a complex permanent tissue found inside the vascular bundle. The transport of water in plants occurs through xylem tissue.

Connective tissues are mainly of three types: 1. Connective tissue proper, 2. Liquid connective tissue (e.g., blood and lymph), 3. Supporting connective tissue (e.g., cartilage and bone). Therefore, (a) Blood and (b) Bone are examples of connective tissue. Epithelial tissue and cardiac muscle (muscular tissue) are different types of tissues.