Permanent Tissues - UNSOLVED PRACTICE SET
Chapter: Tissues | Topic: Permanent Tissues Simple Parenchyma Collenchyma Sclerenchyma
PERMANENT TISSUES - UNSOLVED PRACTICE SET
Topic: Permanent Tissues Simple Parenchyma Collenchyma Sclerenchyma
Multiple Choice Questions
Q1. Parenchyma cells are characterised by:
- Thick lignified cell walls
- Thin cell walls with large intercellular spaces
- Elongated cells with thick walls at corners
- Dead cells with no protoplasm
Q2. Collenchyma tissue provides:
- Rigidity and strength to the plant
- Flexibility and mechanical support to growing parts
- Water conduction
- Food storage
Q3. Sclerenchyma cells are typically:
- Living cells with thin walls
- Dead cells with thick, lignified walls
- Meristematic cells
- Cells with large vacuoles
Q4. Which of the following tissues is found in the fleshy parts of fruits and vegetables?
- Collenchyma
- Sclerenchyma
- Parenchyma
- Xylem
Q5. The thickening in collenchyma cells is found mainly at:
- The entire cell wall
- The corners of the cell
- The middle of the cell wall
- Only the outer wall
Short Answer Questions
Q6. Describe the structure and function of parenchyma tissue. Where is it found in plants?
Q7. Differentiate between collenchyma and sclerenchyma in terms of cell wall thickness, cell state (living/dead), and function.
Q8. Why are sclerenchyma cells dead at maturity? How does this benefit the plant?
Q9. What is chlorenchyma? How does it differ from typical parenchyma?
Long Answer Questions
Q10. Draw well-labelled diagrams of parenchyma, collenchyma, and sclerenchyma cells. Compare their structures and functions in a tabular format.
Q11. Explain how the distribution of parenchyma, collenchyma, and sclerenchyma tissues in a plant stem helps the plant perform different functions efficiently.
APPLICATION / ANALYSIS
Q12. A farmer notices that his cucumber plants have soft, tender stems that bend easily in the wind, while his mango tree has hard, woody branches that do not bend.
(a) Which simple permanent tissues are responsible for the difference in stem texture between cucumber and mango?
(b) Explain why cucumber stems need to be flexible while mango branches need to be rigid.
(c) If the farmer wants to make cucumber stems stronger to support more fruit, which tissue should develop more, and how can he encourage this?
Q13. When you bite into a raw carrot, it feels crunchy. But when you cook the same carrot, it becomes soft.
(a) Which tissue in the carrot is responsible for its crunchiness when raw?
(b) What happens to this tissue during cooking that makes the carrot soft? Explain the change at the cellular level.
(c) Why does a raw cucumber not feel as crunchy as a raw carrot, even though both are vegetables?