Question

Tyloses are

• A. Tracheal plugs which plug the lumen of the vessels and tracheids
• B. Compound sieve plates
• C. Specialised secretory cells
• D. Lacticiferous channels

Answer 1

The correct option is A

Tracheal plugs which plug the lumen of the vessels and tracheids

The correct option is A.

Explanation of the correct option:

1. Tyloses are the balloon-like extensions of parenchyma cells through the pit in the cell wall.
2. They go into the lumen of a xylem vessel or tracheid where they divide.
3. These are found in the older woody tissues, where there will be a release of jelly-like gums that avoid the entry of other pathogens when the tissue is damaged.
4. Tyloses help in making sapwood.

Explanation of the incorrect option:

Option B:

Compound sieve plates are the pores in the cell walls of the plant which transport the material.

Option C:

Specialised secretory cells are present in the epidermis or parenchyma tissues.

Option D:

Lacticiferous channels form latex.

Hence, tyloses are tracheal plugs which plug the lumen of the vessels and tracheids.