Saturday, June 16, 2012

Assignments for First Term Class –IX Biology

Fundamental unit of life : Assignments SA-1–IX Biology
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?
Topic – Tissues Assignments SA-1–IX Biology
Q1 Which cells can contract and relax?
Q2 Name the substance that makes cork compact.
Q3 What are root hair?
Q4 What is transpiration?
Q5 What is aerenchyma?
Q6 Name the parenchyma tissue which has chlorophyll.
Q7 Where is meristemetic tissue found in plants?
Q8 What is the difference between bone and cartilage?
Q9 Where are tendons and ligaments found?
Q10 Describe the functions of xylem. Write the function of each component.
Q11 What are complex tissues? Write their different kinds.
Q12 What are cork cells?
Q13 What are stomata? Write about their structure and function?
Q14 What are protective tissues?
Q15 Write the characteristics and functions of collenchyma.
Q16. On the basis of structural and functional difference, write the characteristics of plant and animal tissues.
Topic - Improvement in food resources :Assignments SA-1–IX Biology
Q1. What are milch animals?
Q2. Name two cattle breeds which show excellent resistance of diseases.
Q3. Mention two signs of a healthy animal.
Q4. Name any two local varieties of bees that are used for commercial honey production in India.
Q5. How is the use of manures beneficial for our environment?
Q6. List the important preventive measures to control weeds.
Q7. What are the advantages of bee keeping?
Q8. What are the main elements of animal husbandry?
Q9. Give the merits and demerits of fish culture?
Q10. Write the modes by which insects affect the crop yield.
Q11. Why is excess use of fertilizers detrimental for the environment?
Q12. Define the terms hybridization and photoperiod.
Q13. Differentiate between compost and vermicompost?
Q14. What is green manure?
Q15. What do you understand by organic farming?
 Related Post: 9th Biology Cell- the fundamental unit of life


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