How does the cork act as a protective tissue Ncert?

The cork cells are dead and compactly packed with no intercellular space. Their cell walls are coated with a waxy substance, suberin, which do not allow water and gases to pass through. Therefore, it protects the plant against mechanical injury and also prevents the loss of water by evaporation.

How does the cork act as a protective tissue class 9?

Cork acts as a protective tissue because its cells are dead and compactly arranged without intercellular spaces. They have deposition of suberin on the walls that make them impervious to gases and water.

Who does the cork act as a protective tissue?

It is a protective tissue with suberized cells. Cork is provided with submarines. Subring is a waterproofing waxy substance that prevents water from entering into the tree and it prevents plants from injury and from loss of evaporation.

How close does cork act as a protective tissue?

The secondary meristem forms on its outer side several layered thick cork or the barks of the trees. Cork act as a protective tissue because (i) Its cells are dead and compactly arranged without intercellular spaces. (ii) They also have deposition of suberin on the walls that makes them impervious to gases and water.

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What is protective tissue class 9?

Protective tissues are usually present in the outermost layer of the plant body such as leaves, stem and roots and offer protection to the plant body. They prevent desiccation, mechanical injury, and infection in plants.

What is the function of cork Class 9?

The walls of cork cells contain a chemical called suberin, which makes them impermeable to water and gases. Thus, cork cells prevent water loss from plants and also make them more resistant to bacterial and fungal infection.

Does cork act as a protective tissue?

Cork is the outer protective layer of bark of a tree. … Cork is hard and very rigid which can give good insulation. Protective tissues are a special type of tissues which protects other cells and tissues from the external injuries, basically, it works as an external barrier which prevents the external forces.

How does crock act as a protective tissue?

Cork acts as a protective tissue because its cells are dead and compactly arranged without intercellular spaces. They have deposition of suberin on the walls that make them impervious to gases and water.

How does bark act as a protective tissue?

It consists of cork (dead outermost protective tissue of older stem), cork cambium, cortex and phloem. … Phallogen cut the cell inside as phelloderm or secondary cortex and outer side as phellem of cork. The bark is a water proof protective layer (bark) present on the trees to prevent loss of water through evaporation.

What is the role of epidermis in plants How does the cork act as a protective tissue?

The main function of epidermis is to protect the plant from desication and infection. Cork : As roots and stem grow older with time (increase in girth), tissues at the periphery become cork cell. … cork cells prevent desiccation (loss of water from plant body), infection and mechanical injury.

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Why does epidermal tissue have no intercellular space?

As it has to prevent water loss, as well as inhibit invasion of pathogenic microbes. The epidermal tissues serve as the barrier between the external environment and the body. Hence, epidermal tissues have no intercellular spaces.

What is a protective tissue?

Hint: Protective tissues are generally present in the outermost layer of the plant body such as leaves, stem, and roots, and offer safety to the plant body. They stop desiccation, mechanical injury, and infection in plants. Complete answer: … It is a plain tissue with only one type of cell.