BIOLOGY [2 Mark Question Answer]

Nerve cell or neuron is a cell of the nervous system, capable of transmitting signals or impulses within the body. Each neuron consists of a cell body or cyton with a nucleus and elongated hair like extensions called axons and dendrites. Nervous tissue is found in brain, spinal cord and nerves and carries out transmission of signals or impulses within the body.

Tendon	Ligament
Tendons connect muscles to bones.	Ligaments connect two bones at joints.

Parenchyma	collenchyma
It is concerned with photosynthesis, storage of various materials and wound healing	It provides mechanical support and elasticity to the plant body.
Parenchyma cells have thin cell walls.	The cell wall of the collenchyma cell is unevenly thickened.

Cell	Tissue
The cell is the smallest basic structural and functional unit of all living organisms.	The tissue is a group of cells of similar structure and function.
It is present in all living organisms.	It is absent in unicellular organisms.

Permanent tissue refers to a group of cells which temporarily or permanently cease to divide and thus assume permanent form and function

Meristematic tissue is a group of cells that constantly divide and produce cells indefinitely throughout the life of the plant.

Vascular tissue is the complex plant tissue in higher plants that are composed of xylem and phloem and is concerned with conducting water, minerals, and organic food throughout the plant body.

Phloem is a complex plant tissue found in all parts of the plant like roots, stems and leaves and is mainly responsible for the conduction of organic food prepared by the plant.

Permanent tissue is a group of cells which temporarily or permanently cease to divide and thus assume permanent form and function.

In man, cartilage is found in the nose, ear, bronchial tubes, rings of the trachea, between vertebrae, and at the end of long bones such as ribs.