Question

Which among the following is incorrect about different cells in Phloem?

• A. Sieve tubes are tubular cells with perforated walls with large vacuoles, peripheral cytoplasm and without nucleus
• B. Companion cells are specialized parenchyma cells that help in regulation of metabolic activities
• C. Phloem parenchyma cells are elongated cylindrical cells that support sieve tubes
• D. Phloem fibers are living cells with extremely thick cell walls and provide mechanical strength

Answer 1

Answer:

D. Phloem fibers are living cells with extremely thick cell walls and provide mechanical strength

Phloem

• Sieve tubes are tubular cells with perforated walls with large vacuoles, peripheral cytoplasm and without nucleus.

• Companion cells are specialized parenchyma cells that help in regulation of metabolic activities.

• Phloem parenchyma cells are elongated cylindrical cells that support sieve tubes.

• Phloem fibers are dead cells with extremely thick cell walls and provide mechanical strength.