Organisation of Life Model Questions

8th Standard EM

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Science

Time : 01:00:00 Hrs
Total Marks : 50
    4 x 1 = 4
  1. __________ is tough and thick white sheath that protect the inner parts of the eye.

    (a)

    sclera

    (b)

    conjunctiva

    (c)

    cornea

    (d)

    iris

  2. The process of air passing in and out the lungs is called ___________.

    (a)

    Inhalation

    (b)

    Exhalation

    (c)

    Breathing

    (d)

    None of these

  3. _______tissues for conduction of nerve impalses

    (a)

    Epithelial

    (b)

    Muscular

    (c)

    Nervous

    (d)

    Supporting

  4. _________million alveoli located at the end of branchial tubes

    (a)

    480

    (b)

    300

    (c)

    100

    (d)

    200

  5. 5 x 1 = 5
  6. __________ is the structural and functional unit of living organisms.

    ()

    Cell

  7. ___________ is a good example for anaerobic respiration.

    ()

    Yeast

  8. The size of the cells are measured in units of __________.

    ()

    Micron

  9. __________is commonly known as the voice box

    ()

    Larynx

  10. __________is the sum of chemical reactions by which living organisms sustain their life

    ()

    Metabolism

  11. 5 x 1 = 5
  12. Carbohydrates

  13. (1)

    amino acid

  14. Protein

  15. (2)

    Cholesterol and other steriod.

  16. Glucose

  17. (3)

    glucose

  18. Amino acids

  19. (4)

    enzymes,hormone, protein

  20. Fatty acids

  21. (5)

    glcogen and other sugars

    7 x 2 = 14
  22. What is cell differentiation?

  23. Mention the function of ‘Alveoli’?

  24. Differentiate between Osmoconformers and Osmoregulators?

  25. Explain why are you not able to breathe normally when you are in closed and crowded places?

  26. Define cell.

  27. What is homeostasis?

  28. Define Osmoregulation.

  29. 4 x 3 = 12
  30. Define Prokaryotic cell?

  31. State different types of epithelial cells?

  32. Why do we need instant energy? Does glucose give that energy? Explain.

  33. What is respiration?

  34. 2 x 5 = 10
  35. Differentiate between inhalation and exhalation.

  36.  Explain the mechanism of breathing.

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