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

Sieve tubes and companion cells are present in

Sieve tubes and companion cells are absent in

Sieve tubes and companion cells are absent in

Sieve tubes and companion cells are absent in

Sieve tubes and cokpanin cells occur in

The sieve tubes and companion cells are exceptional features of

The sieve tubes and companion cells are exceptional features of

Assertion : Death of companion cell results in the death of its adjacent sieve tube member. Reason : Companion cells and sieve tube cells are derived from the same mother cell.

Identify the statements as true(T) or false(F). A. Xylem fibres are the components of xylem in all categories of vascular plants. B. Advanced angiosperm families like Winteraceae & Trochodendraceae do not have vessels. C. Sieve tubes & companion cells are ontogenetically related & are called sister cells. D. The cytoplasm of a mature sieve tube occurs in the form of a thin-living layer along the inner side of cell walls.

Sieve tubes differ from sieve cells in