Question

Function of torus is to

• A. Regulate water conduction
• B. Stop water conduction
• C. Inhibit water conduction
• D. Help in water absorption

Answer 1

The correct option is A Regulate water conduction

The disc-shaped central thickening of pit membrane is known as a torus. Its diameter is wider than that of the pit aperture. It is mainly found in gymnosperms. When it is placed at the median position it helps in easy passage of water while it completely restricts the movement of water when placed laterally. It is known as aspirated pit when it restricts the movement of water.

So, the correct answer is option A.