Test: Supporting Tissues & Complex Tissues of Plants - JAMB MCQ

Xylem is a type of supportive tissue in plants. It is responsible for transporting water, minerals, and providing mechanical support to the plant. It is composed of several types of cells, including vessel elements and tracheids, which have thickened lignified cell walls that provide strength and rigidity.

Sclerenchyma is the supportive tissue in plants that provides mechanical strength and support. Its cells are characterized by thick, lignified secondary cell walls, which make them rigid and strong. Sclerenchyma cells are often found in mature plant parts like stems, branches, and the outer covering of seeds.

Cells in sclerenchyma tissue have lignified cell walls, which provide rigidity and strength to the plant. These walls contain a substance called lignin, which makes them hard and impermeable to water. Due to the presence of lignin, sclerenchyma cells are dead at maturity and cannot elongate.

Xylem is the tissue responsible for transporting water and minerals in plants. It consists of specialized cells called vessel elements and tracheids that are interconnected to form continuous tubes. These cells are dead at maturity and have thickened walls, providing structural support and allowing efficient water conduction.

Complex tissue in plants is composed of two or more types of cells that work together to perform specific functions. Examples of complex tissues include xylem, phloem, and epidermis. These tissues have different cell types with specialized functions, allowing plants to transport substances, provide support, and protect against water loss.

Phloem is the complex tissue responsible for the conduction of food in plants. It transports organic nutrients, such as sugars and amino acids, from the leaves (source) to other parts of the plant (sinks). The phloem consists of sieve tube elements and companion cells, which work together to facilitate the movement of food substances.

Collenchyma is a complex tissue that provides mechanical support to the plant. Its cells have thickened cell walls, mainly at the corners, which allow flexibility and support in young and growing plant parts. Collenchyma cells are often found in leaf stalks, petioles, and young stems.

Phloem is an example of complex tissue in plants. It is involved in the transport of food substances, such as sugars, from photosynthetic tissues to other parts of the plant. Phloem consists of sieve tube elements and companion cells, which work together to maintain the flow of organic nutrients throughout the plant.

The cells in phloem tissue are responsible for the conduction of food substances, such as sugars and amino acids, throughout the plant. The sieve tube elements form a continuous network of tubes for the efficient transport of these organic nutrients. Companion cells provide metabolic support to the sieve tube elements.

Xylem is a dead tissue in plants. The cells in xylem tissue, such as vessel elements and tracheids, are dead at maturity. Their main function is to transport water and minerals from the roots to the rest of the plant. The cell walls of xylem cells are reinforced with lignin, providing strength and support.