BIOLOGY WORKSHEET
CLASS: IX
TISSUES
Answer the following questions:
1. What are the dividing cells at the tip of root and stem known as?
2. What are vascular bundles?
3. Name the tissue which allows aquatic plants to float.
4. Why vessels and tracheids have tubular structures?
5. What are the four components of xylem?
6. Name the tissue which provides flexibility to plants.
7. Name the meristem which is responsible for the increase of girth of root.
8. What is the difference between collenchyma and sclerenchyma?
9. What happens when dried raisins are kept in water for a few hours?
10. What is lignin? Where is it present?
11. Which type of simple tissue is used for making ropes?
12. Give one example of protective tissue in plants?
13. Where do you find meristesmatic tissues in plants?
14. Name the two basic types of tissues found in plants?
15. Water hyacinth floats on water surface. Explain.
16. Which structure protects the plants body against the invasion of parasites? Mention its
other functions also.
17. Branches of a tree are able to move and bend freely in high wind velocity. Why?
18. Meristematic cells have a prominent nucleus and dense cytoplasm but they lack
vacuole. Why?
19. Make a flow chart to explain various types of tissues in plants.
The Fundamental Unit Of LIfe
Q1 Write the main function of leucoplast.
Q2 What is the function of SER in liver cells of vertebrates?
Q3 Why the RER appears rough?
Q4 Why viruses are not supposed to be living?
Q5 What is a nucleoid?
Q6 Why dry raisins placed in water swell up?
Q7 In which part of a plant chromoplasts are found?
Q8 Where are genes located?
Q9 What will happen if we keep a plant cell or animal cell in a i) Hypotonic solution ii)
Hypertonic solution iii) Isotonic solution.
Q10 Explain the importance of osmosis for living beings?
Q11 Give the historical development of cell theory.
Q12 Who coined the term “cell “ and how?
Q13 Write the contribution of (a) Robert Hooke, (b) Leeuwenhoek (c) Robert Brown
Q14 Draw a large diagram of an animal cell as seen through aan electron microscope.
Label the parts that carry on the function of Respiration, secretion, protein synthesis,
transport of material.
Q15 Which substance is responsible for transfer of characters from one generation to
another?
Q16 Name the smallest and largest known cell.
Q 17 Who discovered the nucleus of a cell?
Q18 What is the ‘Power house” of a cell and why it is called so?
Q19 Name the longest cell of human body.
Q20 Which cell organelle is known as suicidal bags?
Q21 What does ATP stands for?
Q22Where are the genes located?
Q23 Define osmosis and exosomosis
Q24 What is a nucleoid?
Q25 What is endocytosis?
Q26 Name the plastid which stores starch, oil and protein granules.
Q27 What is DNA? Where is it found?
Q28 Name the processes by which CO2 and water moves in and out of the cells.
Q29 What is membrance biogenesis?
Q30 What are chromoplast? What are its functions?
Q31 In what aspects, vacuoles in plant cells differ from those in the animal cells?
