Match the items given in column I with those in column II and select the correct option given below:
  
Answer variants:
Sieve cells are elongated and are unique long
Walls are with tapered ends.
Narrow
single cells
Unidirectional
Roots to apical parts
S. No
Characters
Column I
Column II
1. Sieve cells
2.Lumen of tracheid and the tracheids are formed from
3.Conduction of xylem and conduction happens from