Plant and Animal Hormones Book Back Questions

10th Standard EM

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 30
    2 x 1 = 2
  1. Gibberellins cause:

    (a)

    Shortening of genetically tall plants

    (b)

    Elongation of dwarf plants

    (c)

    Promotion of rooting

    (d)

    Yellowing of young leaves

  2. Which organ acts as both exocrine gland as well as endocrine gland

    (a)

    Pancreas

    (b)

    Kidney

    (c)

    Liver

    (d)

    Lungs

  3. 5 x 1 = 5
  4. _______ causes cell elongation, apical dominance and prevents abscission.

    ()

    Auxin

  5. ___________ is a gaseous hormone involved in abscission of organs and acceleration of fruit ripening.

    ()

    Ethylene

  6. The hormone which has negative effect on apical dominance is _________.

    ()

    cytokinin

  7. In the islets of Langerhans, beta cells secrete ________

    ()

    insulin

  8. Decreased secretion of thyroid hormones in the children leads to _________

    ()

    cretinism

  9. 5 x 1 = 5
  10. Thyroxine

  11. (1)

    Simple goitre

  12. Insulin

  13. (2)

    Acromegaly

  14. Parathormone

  15. (3)

    Tetany

  16. Growth hormone

  17. (4)

    Diabetes insipidus

  18. ADH

  19. (5)

    Diabetes mellitus

    3 x 2 = 6
  20. Write the name of a synthetic auxin.

  21. What is the hormone responsible for the secretion of milk in female after child birth?

  22. Name the endocrine glands associated with kidneys.

  23. 3 x 4 = 12
  24. What is bolting? How can it be induced artificially?

  25. Write the differences between endocrine and exocrine gland.

  26. What is the role of parathormone?

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