Saturday, October 11, 2008

TEST PAPER 11 - UNITS 6,7,8 - 50 MARKS

There are 26 questions in all and time limit is 90 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 7]


  1. In insects the air enters the tracheal system through ______.

    1. spiracles
    2. nostrils
    3. lungs
    4. bronchi

  2. The function of incisors is ______.

    1. cutting
    2. tearing
    3. grinding
    4. chewing

  3. There are ______ types of antigens on erythrocytes.

    1. five
    2. four
    3. three
    4. two

  4. A sunflower plant bends towards the sun; it is ______ response.

    1. thigmonastic
    2. seismonastic
    3. thermonastic
    4. photonastic

  5. ______ is useful where seeds have long dormancy period and poor germination capacity.

    1. Cutting
    2. Layering
    3. Grafting
    4. Regeneration

  6. ______ is an example of retrovirus.

    1. Virus causing AIDS
    2. TMV
    3. Bacteriophage
    4. RIV

  7. Eutrophication increases due to increase in ______.

    1. BOD
    2. industrialisation
    3. DOB
    4. soil erosion


    SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 7]

  8. Through what does a frog respire ?
  9. What is lymph ?
  10. Which plant hormones retard growth ?
  11. What is menopause ?
  12. What is the difference between prokaryotic and eukaryotic chromosomes ?
  13. What is meant by organic evolution ?
  14. What is the full form of NEERI ?


    SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 12]

  15. Describe the effect of water and carbon dioxide on the process of photosynthesis.
  16. Write a note on blood platelets.
  17. Explain : Photoperiodism  OR   Mention the names of four endocrine glands in humans.
  18. Distinguish between asexual and sexual reproduction(two points).
  19. Explain : Variation.
  20. Mention two effects of land pollution.  OR   Draw a chart showing types of environment.


    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 9]

  21. Describe exchange of gases in roots and stems with diagram.  OR   Describe digestive system of grass-hopper with diagram.
  22. Write a note on tropism.
  23. Mention any six laws for environmental protection in India.


    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 15]

  24. Describe excretion in eatrhworm.  OR   Describe the structure of nephron with diagram.
  25. Describe sexual cycle in human female.
  26. Write a note on types of chromosomes with diagram.


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