Plant Anatomy: Xylem Tissue

What is the etymological origin of the word 'xylem'?

• From 'xylon' meaning vessel

• From 'xylos' meaning wood

• From 'xylum' meaning transport

• From 'xylin' meaning water

Which components make up the xylem tissue?

• Sieve tubes and companion cells

• Vessel elements and phloem cells

• Tracheids and vessel elements

• Parenchyma and sclerenchyma

What happens to xylem cells when they reach maturity?

• They develop thicker cell walls

• They remain metabolically active

• They maintain their cytoplasm

• They die and lose their cellular contents

What is the primary function of xylem tissue?

• Transport sugars throughout the plant

• Store water in plant tissues

• Support the plant structure

• Transport water from roots to other parts

What is the shape of vessel elements and tracheids?

• Spherical and compact

• Rectangular and flat

• Cylindrical and elongated

• Irregular and branched

How are vessel elements arranged in xylem tissue?

• Connected end-to-end forming vessels

• Scattered randomly throughout

• Arranged in spiral patterns

• Isolated from each other

What is the cross-sectional shape of xylem cells?

• Triangular

• Perfectly circular

• Angular-rounded

•  Rectangular

What type of end walls do xylem cells possess?

• Only curved walls

• Horizontal or oblique walls

• Only vertical walls

• Wavy walls

Which substance is deposited in xylem cell walls?

• Suberin

•  Cutin

• Pectin

• Lignin

What comprises the secondary wall thickening in xylem cells?

• Lignin and suberin

• Cellulose and hemicellulose

• Pectin and proteins

• Waxes and oils