ISC Class 12 Biology Solved Question Paper 2006

Short Answer Type

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Draw a labelled diagram of the transverse section of the cochlea of the human ear.

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    Give an account of the evidence which shows the common ancestry of man and apes. 
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    Enumerate any three causes of mental illness ?
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    Describe the events that take place from the time of entry of the human sperm into the ovum till fertilization is complete. 
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    What is seed dormancy ? How can it be broken artificially ? 
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    Describe the Oparin-Haldane theory of the origin of life.
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    Explain the following :

    (i) Grafting
    (ii) Vital capacity
    (iii) Ureotelism
    (iv) Epigeal germination.

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    Define cardiac output. Describe the mechanism regulating the heart beat.
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    What are vestigial organs ? 
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    Explain hybridization. Describe the various techniques of hybridization in plants. 
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