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Protoxylem is
 

Option: 1

First formed secondary xylem


Option: 2

First formed primary phloem


Option: 3

Later formed primary xylem


Option: 4

First formed primary xylem

 


Answers (1)

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  • On the basis of origin xylem can be of two types:
  1. Primary xylem:  It originates from the procambium during the primary growth of the plant. The primary xylem which is formed early is called protoxylem while the one formed later is called metaxylem.
  2. Secondary xylem: It originates from the vascular cambium during secondary growth of the plant. It constitutes the ‘wood’. 

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Protoxylem is first formed primary xylem.

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Gaurav

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