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  • Tell me? Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem : Secondary cortex Wood Secondary phlo

Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem :

  1. Secondary cortex
  2. Wood
  3. Secondary phloem
  4. Phellem

The correct order is :

 

  • Option 1)

    (a),(b),(d),(c)

  • Option 2)

    (d),(a),(c),(b)

  • Option 3)

    (d),(c),(a),(b)

  • Option 4)

    (c),(d),(b),(a)

 

Answers (1)

best_answer

As discussed in

Anatomy of Dicot Stems -

  • In contains outer single layer called epidermis, convered by cuticle, bears trichomes (multicellular hairs). Epidermis lacks chloroplast.
  • Cortex is divided into hypodermis, general cortex & endodermis.
  • Pericycle is situated in between endodermis & vascular bundles.
  • Vascular bundles (wedge shaped) are arranged in a ring. It is conjoint, collateral and open. Eustele is present.
  • Pith is made up of paranchyma cells. Function of pith is storage of water and food.
  • Pith ray or medullary ray is present built in pith which radially conduct food and water.

 

- wherein

Anatomy

 

 Annual ring (wood) is present between medullary rays and pith


Option 1)

(a),(b),(d),(c)

Option is incorrect

Option 2)

(d),(a),(c),(b)

Option is correct

Option 3)

(d),(c),(a),(b)

Option is incorrect

Option 4)

(c),(d),(b),(a)

Option is incorrect

Posted by

prateek

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