Question

This type of cells are not present in phloem of a monocot stem.

• A. Phloem parenchyma.
• B. Sieve tubes.
• C. Companion cells.
• D. Phloem fibres.

Hint:

Remember: Phloem parenchyma is absent in monocots but present in dicots.

Answer 1

The Correct Option is A

Phloem is a complex permanent tissue that transports food in plants. It generally consists of four components: sieve tubes, companion cells, phloem fibres, and phloem parenchyma.
However, there is a significant difference in the composition of phloem in dicot and monocot stems:
- In dicots, all four components are present.
- In monocots, phloem parenchyma is absent.
Monocot phloem typically includes sieve tubes, companion cells, and phloem fibres, but lacks phloem parenchyma, which is responsible for storing food and helping in lateral transport. Therefore, the type of cell not found in the phloem of a monocot stem is phloem parenchyma.

Answer 2

Phloem is a complex tissue responsible for transporting food in plants and consists of several cell types such as sieve tubes, companion cells, phloem fibers, and phloem parenchyma.

In monocot stems, the vascular bundles are usually closed and have limited or absent vascular cambium, which influences the presence of certain phloem cells.

Specifically, phloem parenchyma cells, which function in storage and lateral transport of nutrients, are typically absent in the phloem of monocot stems.

Instead, the monocot phloem mainly contains sieve tubes and companion cells but lacks phloem parenchyma, unlike dicot stems where phloem parenchyma is present.

Correct Answer: Phloem parenchyma.