Question

The live elements present in the phloem is_____________.

• A. Companion cells
• B. Phloem fibres
• C. Phloem parenchyma
• D. Trachea
• E. Both A and C

Answer 1

The correct option is E Both A and C

Companion cells and phloem parenchyma are living cells.

Companion cells are specialized parenchyma cells adjacent to a sieve tube in the phloem of flowering plants, believed to regulate the flow of nutrients through the tube. It is a type of cell found within the phloem of flowering plants. Each companion cell is usually closely associated with a sieve element. Its function is uncertain, though it appears to regulate the activity of the adjacent sieve element and to take part in loading and unloading sugar into the sieve element.

Phloem parenchyma cells are called transfer cells and border parenchyma cells, are located near the finest branches and terminations of sieve tubes in leaf veinlets, where they also function in the transport of foods.

So, the correct answer is option E.