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Showing posts from July 26, 2009

WHAT ARE LIVING ORGANISMS MADE OF?

Define a cell. Who coined the term ‘cell’? 1.Who discovered the cell and how? 2.“Every multicellular organism has evolved from a single celled organism.” Comment on the statement 3.citing a few examples. Who discovered free–living cell for the first time and where? 4.Who discovered the nucleus and when? 5.Who coined the term ‘protoplasm’? What does it mean? 6.What is the contribution of the “cell theory” to modern science? Who gave it? 7.What is the contribution of ‘Virchow’ to modern science? 8.Suggest two factors, on which the shape of a body cell depends? Support your answer giving the shape of various human cells. Name and draw the longest cell in the human body. 10.Distinguish between unicellular and multicellular organisms. 11.What is the significance of division of labour in cells of multicellular organisms? Is the same observed in unicellular organisms? Name the basic structural and functional unit of life? Why is it called so? 13.Name: (a) four unicellular organisms 14.b) four

NATURAL RESOURCES

AIR 1. What is a resource? 2. What are natural resources? Give few examples. 3. What is atmosphere? 4. What would happen if there is no air on earth? 5. Explain various layers of atmosphere . How do various layers differ from each other? 6. What is ozone layer? Where is it present? What is its importance? 7. What is air? Give its main characteristics. 8. Give the composition of air. 9. What is the role of atmosphere to maintain the sanctity of ‘mother nature ’ towards us? 10. What is wind? What causes the formation of winds? 11. Explain various factors which affect the wind movement. 12. Explain various effects of wind on our surroundings. 13. What are the effects of wind on plants? 14. What leads to the formation of rains? 15. How do dust particles help in precipitation in the form of rainfall or snowfall? 16. In what ways precipitation can occur? WATER 17. What are the various sources of water on earth? 18. Enlist the main characteristics of water. 19. What are

Class XI

Biomolecules Aug 23, 2009 BUILDING BLOCKS OF BIOMOLECULES 1. Give one contribution of the following scientist(a) Frederick Meischer (b) Biot (c) Van’t Hoff and LeBel (c) Louis Pasteur (e) E. Fischer(a) Frederick... Continue >> CELLULAR TECHNIQUES Aug 23, 2009 1. Name the scientists who described individual cells as the fundamental unit of life in 1838.Mathias Jacob Schleiden and Theodore Schwann.2. What is the total magnification in a common... Continue >> CHAPTER16. DIGESTION & ABSORPTION Aug 23, 2009 1. Define digestion. 2. Draw a well labeled diagram of human digestive system. 3. Describe the various terms used for dentition in human. 4. Write the dental formula of human. 5. Explain the... Continue >> Chapter 3 -Plant Kingdom -Systems of Classification Aug 23, 2009 ARTIFICIAL SYSTEM OF CLASSIFICATION NATURAL SYSTEM OF CLASSIFICATION PHYLOGENETIC SYSTEM OF CLASSIFICATION Basis Based on a few characteristics features like vegetative characters or structure... Con

LIFE PROCESSES

Life Processes ImpQ 01 Life Processes ImpQ 01 CBSE Question Bank on HOTS and other Important Questions for class 10 Science and Technology. Total Downloads:1444 File Size:93KB Download Now Life Processes ImpQ 02 Life Processes ImpQ 02 CBSE Question Bank on HOTS and other Important Questions for class 10 Science and Technology. Total Downloads:1008 File Size:8KB Download Now Life processes, nutrition, respiration, transportation, excretion. The basic functions performed by living organisms to maintain their life on this earth are called life process. Life Processes Test Paper 01 Life Processes Test Paper 01 for year 2009-2010 CBSE Board class 10 Science and Technology. Total Downloads:397 File Size:23KB Download Now Life Processes Test Paper 02 Life Processes Test Paper 02 for year 2009-2010 CBSE Board class 10 Science and Technology. Total Downloads:352 File Size:23KB Download Now Life Processes Test Paper 03 Life Processes Test Paper 03 for year 2009-2010 CBSE Board class 10 Science a

Acids and base

10science_acids_base_and_salts_test_6_2009 Description: 10science_acids_base_and_salts_test_6_2009Version: Filesize: 0 bytesAdded on: 20-May-2008 10science_acids_base_and_salts_test_5_2009. Description: 10science_acids_base_and_salts_test_5_2009.Version: Filesize: 0 bytesAdded on: 20-May-2008 10science_acids_base_and_salts_test_4_2009 Description: 10science_acids_base_and_salts_test_4_2009Version: Filesize: 0 bytesAdded on: 20-May-2008 10science_acids_base_and_salts_test_3_2009 Description: 10science_acids_base_and_salts_test_3_2009Version: Filesize: 0 bytesAdded on: 20-May-2008 10science_acids_base_and_salts_test_2_2009 Description: 10science_acids_base_and_salts_test_2_2009Version: Filesize: 0 bytesAdded on: 20-May-2009 10science_acids_base_and_salts_test_1_2009 Description: 10science_acids_base_and_salts_test_1_2009Version: Filesize: 0 bytesAdded on: 20-May-2008