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Study all the statements given below and select the incorrect statement –

  1. Heartwood does not help in water conduction.

  2. The cambial ring is present between primary xylem and primary phloem.

  3. The non-conducting part of the secondary xylem, which is dark in color, is known as sapwood.

  4. Activity of the pericycle forms the cambium during secondary growth in dicot roots.

Option: 1

1 and 2 
 


Option: 2

1 and 3


Option: 3

3 only 

 


Option: 4

None of these


Answers (1)

best_answer
  • Heartwood does not help in water conduction. Heartwood is dark in color and part of the secondary xylem. It is hard and its tracheary elements have tannins, resins, gums etc. 

  • The cambial ring is present between primary xylem and primary phloem which further begin to cut off new cells, both towards the inner and Outer side. The cell towards the pith is called secondary xylem and the cell towards periphery matures into secondary phloem.

  • The sapwood is the soft and lightened part. It mainly conducts water and minerals.

  • Activity of the pericycle forms the cambium during secondary growth in dicot roots by either directly or after a few divisions becomes converted into a secondary meristem called phellogen.

  • Option 3 is the correct answer. 

 

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manish

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