Question

Enucleate thin-walled cells with perforated septa are

• A. Prosenchyma
• B. Sieve cells
• C. Sieve tube elements
• D. Companion cells.

Answer 1

The correct option is C Sieve tube elements

Sieve-tube elements are almost always adjacent to nucleus-containing companion cells, which have been produced as sister cells with the sieve element from the same mother cell. Companion cells apparently function with the enucleate sieve-tube elements and die when they break down. The sieve cells of non-angiospermous vascular plants lack true companion cells, although other adjacent cells may serve a similar function.

So, the correct answer is 'Sieve tube elements.'