Question

The tissue having dead cells is
a. Xylem
b. Collenchyma
c. Parenchyma
d. Phellogen

Answer 1

Hint: Plant tissue mainly consists of two types of tissues, they are simple tissue and complex tissue, where simple tissue is made up of a unique type of cells, while complex tissue comprises different types of cells.

Complete answer:
> Xylem: It is the vascular tissue found in the plants and it consists of different types of cells
The main function of the xylem is transport, where it transports the water and minerals from the roots to other parts of the plants.
Xylem consists of different elements such as tracheids and vessel members and xylem parenchyma and xylem fibers.
Among all the elements, only xylem parenchyma is the living tissue, while remaining all other elements are dead, where they are lignified and passively help in the transport of water, xylem fibers are helpful for providing mechanical strength.

> Collenchyma: It is the living supportive tissue found in plants, and it consists of a thick cell wall, it's main function is to provide the mechanical strength to the plants.

> Parenchyma: It is the living tissue mostly found in all parts of the plants and they are more concentrated in leaves, they have a thin cell membrane and its main functions are photosynthesis and storage of food.

> Phellogen: It is just like a cambium meristem, it helps in the lateral growth of the plants, phellogen arises as the deeper parts of the plants and separates the other parts from the outer environment and this is living cells.

Hence, the correct answer is option (A).

Note: Out of both vascular tissues found in plants, that is xylem and phloem, xylem contains most of the dead cells, while the phloem contains still living cells and their function in plants is almost equal which is transport.