Question

Which one the following is the xylem tissue?

• A. Sieve elements
• B. Companion cells
• C. Phloem fibres
• D. Tracheids

Answer 1

Answer: (D)

Tracheids

Xylem is the permanent complex tissue that plays the main role in the conduction of water and minerals in plants. It consists of four different elements that made complete xylem.

1. Tracheids are elongated tube-like cells with tapering or round ends with hard and lignified walls and are dead.
2. Xylem vessels are a row of elongated tube-like cells placed end to end are multicellular with a wide lumen. These are present in angiosperms only.
3. Xylem parenchyma is only living element and serves as the storage of reserve food in the form of starch or fat.
4. Xylem fiber is long slender, pointed, dead and sclerenchymatous cells provide strength to plant.

So the correct option is 'Tracheids'