Sieve tubes and companion cells are absent in

Sieve tubes and companion cells are present in

The sieve tubes and companion cells are exceptional features of

The sieve tubes and companion cells are exceptional features of

Sieve tubes and companion cells are sister cells and (a) Companion cells maintain the osmotic balance in sieve elements (b)Both cells are derived from same mother cells (c )Sieves are associated with companion cells in all seed bearing plants (d) Companion cells present in Pinus only

Sieve tubes and companion cells are sister cells and (a) Companion cells maintain the osmotic balance in sieve elements (b)Both cells are derived from same mother cells (c )Sieves are associated with companion cells in all seed beasing plants (d) Companion cells present in Pinus only

A: Sieve tubes and companion cells are related ontogenetically. R: Both develop from same mother cell.

A: Sieve tubes and companion cells are related ontogenetically. R: Both develop from same mother cell.

Companion cells are absent in phloem of

Sieve tubes and cokpanin cells occur in

companion cells are absent in the phloem of