Complex Tissues - UNSOLVED PRACTICE SET
Chapter: Tissues | Topic: Complex Tissues Xylem and Phloem
COMPLEX TISSUES - UNSOLVED PRACTICE SET
Topic: Complex Tissues Xylem and Phloem
Multiple Choice Questions
Q1. Xylem tissue is responsible for the transport of:
- Food materials
- Water and minerals
- Oxygen
- Hormones
Q2. Which of the following cells in xylem are living?
- Tracheids
- Vessels
- Xylem parenchyma
- Xylem fibres
Q3. Phloem tissue transports food from:
- Roots to leaves
- Leaves to other parts of the plant
- Stem to roots only
- Flowers to fruits
Q4. The companion cells in phloem are associated with:
- Tracheids
- Sieve tubes
- Xylem vessels
- Sclerenchyma fibres
Q5. Which of the following is NOT a component of xylem?
- Tracheids
- Vessels
- Sieve tubes
- Xylem fibres
Short Answer Questions
Q6. Name the four components of xylem and state whether each is living or dead.
Q7. Differentiate between tracheids and vessels in terms of structure and efficiency of water transport.
Q8. What is the function of companion cells in phloem? Why are they necessary for sieve tube function?
Q9. Explain why xylem transport is unidirectional while phloem transport is bidirectional.
Long Answer Questions
Q10. Draw well-labelled diagrams of xylem and phloem tissues. Identify and label all cell types in each tissue. Explain how the structure of each cell type supports its function.
Q11. Describe the mechanism of translocation in phloem. How does food move from source to sink? Explain the role of sieve tubes and companion cells in this process.
APPLICATION / ANALYSIS
Q12. A gardener accidentally removes a ring of bark (including phloem) from a tree trunk in a process called girdling.
(a) What will happen to the tree after girdling? Explain which tissue is affected and why.
(b) Will the tree be able to transport water to its leaves after girdling? Give reasons.
(c) If girdling is done at the base of a branch bearing fruit, what would happen to the size of the fruit? Explain.
Q13. During the summer, a potted plant is left in a closed room with no ventilation. After a few days, the plant wilts and eventually dies.
(a) Which tissue is primarily affected when a plant wilts? Explain.
(b) Why does lack of ventilation cause the plant to wilt faster?
(c) If the plant had been a cactus instead of a leafy plant, would it have survived longer in the same conditions? Give reasons based on tissue adaptations.