Grade 9 Biology Flashcard on Tissues

Front

What is a group of similar cells that work together to perform a specific function called?

Back

Tissue

Answer explanation

A group of similar cells that work together to perform a specific function is called tissue. Tissues combine to form organs, while cells are the basic unit of life, and systems are made up of multiple organs.

Front

Which type of tissue in plants is responsible for conducting water and food?

Back

Vascular tissue

Answer explanation

Vascular tissue is the specialized plant tissue responsible for the transport of water and nutrients. It consists of xylem, which conducts water, and phloem, which transports food, making it essential for plant growth and health.

Front

What type of permanent tissue is characterized by living cells with thickened corners? Options: Collenchyma, Parenchyma, Epidermis, Sclerenchyma

Back

Collenchyma

Answer explanation

Collenchyma is a type of permanent tissue characterized by living cells that have thickened corners, providing support and flexibility to young plant structures. This distinguishes it from other tissues like sclerenchyma, which is dead.

Front

Which type of tissue provides mechanical support and strength to plants? Options: Meristematic tissue, Collenchyma, Sclerenchyma, Parenchyma

Back

Sclerenchyma

Answer explanation

Sclerenchyma is the type of tissue that provides mechanical support and strength to plants. It consists of thick-walled cells that are often dead at maturity, making them ideal for structural support.

Front

What is the main function of xylem in plants?

Back

Transport water

Answer explanation

The main function of xylem in plants is to transport water from the roots to the rest of the plant. This is essential for photosynthesis and nutrient transport, making 'Transport water' the correct answer.

Front

Which type of epithelial tissue is made up of multiple layers of cells?

Back

Stratified epithelium

Answer explanation

Stratified epithelium consists of multiple layers of cells, providing protection in areas subject to abrasion. In contrast, simple epithelium has only one layer, while cuboidal and columnar refer to cell shapes, not layer count.

Front

What is the primary function of the cork in plants?

Back

Protection

Answer explanation

The primary function of cork in plants is protection. It forms a barrier against physical damage and pathogens, helping to safeguard the inner tissues of the plant.

Front

Which type of connective tissue is responsible for binding and supporting other tissues?

Back

Connective tissue

Answer explanation

Connective tissue is specifically designed to bind and support other tissues in the body, making it the correct choice. Epithelial, muscle, and nervous tissues serve different functions and do not primarily provide support.

Front

What type of cells are found in sclerenchyma tissue?

Back

Dead cells

Answer explanation

Sclerenchyma tissue is primarily composed of dead cells that provide structural support. These cells have thick, lignified walls, which contribute to the rigidity and strength of the plant.

Front

What is the role of guard cells in the stomata?

Back

Opening and closing of stomata

Answer explanation

Guard cells regulate the opening and closing of stomata, controlling gas exchange and water loss in plants. This function is crucial for photosynthesis and maintaining homeostasis, making 'opening and closing of stomata' the correct answer.