Definition and Need for Tissues - UNSOLVED PRACTICE SET
Chapter: Tissues | Topic: Definition and Need for Tissues
DEFINITION AND NEED FOR TISSUES - UNSOLVED PRACTICE SET
Topic: Definition and Need for Tissues
Multiple Choice Questions
Q1. A group of cells that are similar in structure and work together to perform a particular function is called:
- An organ
- A tissue
- An organ system
- A cell cluster
Q2. Which of the following is the main advantage of tissues in multicellular organisms?
- Tissues make the organism heavier
- Tissues allow division of labour among cells
- Tissues reduce the number of cells in the body
- Tissues make cells independent of each other
Q3. In unicellular organisms like Amoeba, tissues are:
- Present in large numbers
- Absent
- Present but non-functional
- Present only during reproduction
Q4. The study of tissues is called:
- Cytology
- Histology
- Anatomy
- Physiology
Q5. Which of the following organisms would you expect to have tissues?
- Amoeba
- Paramecium
- Hydra
- Euglena
Short Answer Questions
Q6. Define the term "tissue." Explain why multicellular organisms need tissues while unicellular organisms do not.
Q7. Give TWO examples of functions in the human body that are performed by tissues rather than individual cells.
Q8. Explain the concept of "division of labour" in multicellular organisms. How do tissues help achieve this?
Q9. Why is it difficult for a single cell to perform all life processes efficiently in a large multicellular organism? Give TWO reasons.
Long Answer Questions
Q10. Explain why tissues are essential for the survival of multicellular organisms. Discuss how tissues enable specialisation, efficiency, and coordination in the body. Give examples from plants and animals.
Q11. Compare the organisation of cells in unicellular and multicellular organisms. How does the presence of tissues in multicellular organisms give them an evolutionary advantage?
APPLICATION / ANALYSIS
Q12. A biology teacher asks her class to observe a drop of pond water under a microscope. Student A sees a single-celled Paramecium. Student B examines a thin slice of onion peel and sees many cells arranged in layers.
(a) Why does the onion peel show cells arranged in an organised manner while the Paramecium exists as a single cell?
(b) If the onion cells were not organised into tissues, what problems would the plant face? Give TWO examples.
(c) A student argues: "Unicellular organisms are simpler, so they are less evolved than multicellular organisms." Do you agree? Give reasons.
Q13. Imagine your school is organising a large function. The principal divides students into groups: decoration team, food team, welcome team, and stage management team.
(a) How is this division of work among students similar to the division of labour among tissues in the human body?
(b) What would happen if every student tried to do every task alone? Relate this to what would happen if all body cells tried to perform all functions.
(c) Can you think of ONE disadvantage of dividing work into specialised teams? Does this disadvantage also apply to tissues in the body?