Tag: kinds of plant tissue

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Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Vascular layers of plant body shows

  1. Protective tissue

  2. Epithelial tissue

  3. Meristematic tissue

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vascular bundles of the plant show vascular cambium or cork cambium. Cork cambium is involved in making cork. Cork is a nonliving, water resistant tissue formed in many plants to prevent water loss. Cork cells are dead and have cell walls composed of a waxy substance "suberin" which is highly impermeable to gasses and water. This substance prevents the water loss from the stem. Cork also protects the plant from wear and tear. Hence, it is a protective type of tissue. Therefore, option A is correct.  

Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Which of following tissues do you expect to be the most important during droughts and why?

  1. Vascular tissue because phloem regulates water supply to the plant

  2. Ground tissue because water can be stored in sclerenchyma for use during drought

  3. Epidermal tissue because it is covered with a waxy cuticle and also bears drought responsive stomata

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The epidermis is the outermost cellular layer which covers the whole plant structure, i.e. it covers roots, stem, leaves, flowers, and fruit. It is composed of a single layer of living cells. The outer walls, which are exposed to the atmosphere and usually thickened, are covered by a waxy, waterproof cuticle which is made up of cutin. The waxy cuticle prevents the loss of moisture from the leaves and stems. During drought, the plant hormone abscisic acid (ABA) triggers stomatal closure, thus reducing water loss.

So, the correct answer is option C.