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Question

Choose the correct answer.

Casparian strips are present in:


A

Dicot root

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B

Dicot Stem

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C

Dicot leaf

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D

Monocot stem

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Solution

The correct option is A

Dicot root


The correct option is option A.

Explanation for the correct option:

  1. All higher plants have Caspiarian strips in their roots, which are a type of cellular structure.
  2. They are impregnations of hydrophobic cell walls that resemble rings.
  3. The endodermis(Caspiarian), an inner cell layer that encircles the main vascular strand of roots, is where these impregnations take place.
  4. Dicot roots have a taproot structure, which means they grow deeper into the soil as a single, thick root with lateral branches.
  5. The central vascular structures of dicot roots are encircled by the ground tissue, which is primarily made up of parenchyma cells.
  6. The dicot root's innermost cortical layer contains Casparian strips.

Explanations for the incorrect options:

Option B:

  1. Dicot stems have a dermal layer, multicellular stem hair, and a clearly defined epidermis with a cuticle.
  2. A dicot stem's internal structure is primarily made up of pith, pericycle, hypodermis, cortex endodermis, and epidermis.
  3. Dicot stems include Cucurbita and sunflower, for instance.
  4. The roots of both monocotyledonous and dicotyledonous plants include Casparian strips.

Option C:

  1. Flowering plants having seeds made up of two embryonic leaves, also known as cotyledons, are referred to as dicot or dicotyledonous plants.
  2. Dicot plant leaves have veins that are dispersed in reticulated or net-like patterns.

Option D:

  1. Monocot stems are shielded by an outer layer of skin tissue called the epidermis, similar to how monocot roots are.
  2. The ground and vascular tissues comprise the remainder of the stem.
  3. In the ground tissue, the vascular tissue is organized into dispersed phloem and xylem bundles.

Final answer: Casparian strips are present in dicot root.


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