Question

Which of the following statements pertaining to plant structure is incorrect?

• A. Phellogen, phellem, and phelloderm are collectively known as periderm
• B. Phloem is composed of passage cells, sieve tube elements, phloem parenchyma and phloem fibers
• C. Xylem is composed of tracheids, vessels, xylem fibres, and xylem parenchyma
• D. Tissues such as pericycle, vascular bundles and pith constitute the stele

Answer 1

The correct option is B Phloem is composed of passage cells, sieve tube elements, phloem parenchyma and phloem fibers

Phloem is a complex permanent tissue made up of sieve tubes, companion cells, phloem fibers and phloem parenchyma.

Passage cells are thin walled parechymatous cells found in the endodermis of roots, more prominently in a dicot root.