Simple and Complex Permanent Plant Tissues (Xylem, Phloem) MCQs

Q1. A gardener pours water at the base of a tomato plant and within an hour the upper leaves regain their firmness; which tissue carried that water up the stem?

• A.Epidermis
• B.Phloem
• C.Parenchyma alone
• D.Xylem

Answer: D. Xylem

Xylem is the water-conducting complex tissue. Water absorbed by the roots travels upward through the xylem to the leaves, restoring their turgor.

Q2. When a botanist injects a harmless red dye into the soil around a balsam plant, the stem and leaf veins slowly turn red; which conducting tissue has been stained?

• A.Xylem
• B.Collenchyma
• C.Cambium
• D.Phloem

Answer: A. Xylem

The dye dissolves in soil water and is drawn up with it. Because xylem conducts water upward, the dye highlights the xylem in the stem and veins.

Q3. A forester notices that even the tallest trees lift water from their roots to leaves over 30 metres up without a pump; which dead, tube-like cells make this continuous water column possible?

• A.Sieve tubes of the phloem
• B.Companion cells
• C.Xylem vessels and tracheids
• D.Guard cells

Answer: C. Xylem vessels and tracheids

Xylem vessels and tracheids are dead, hollow, lignified cells joined end to end. They form continuous pipes that carry water all the way up tall trees.