ISC Class 12 Biology Solved Question Paper 2008

Short Answer Type

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Give one function and one deficiency symptom of the following :

Sulphur

Function : It is present in two amino acids, i.e., cysteine and methionine. It is the main constituent of several coenzymes, vitamins and ferredoxin.

Deficiency symptom — Inhibition of Cell-division

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    Define:

    (i) Reproductive Isolation

    (ii) Homologous Organs.

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    Enlist the basic modes of transmission of AIDS.
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    Draw a labelled diagram of the longitudinal section of the human kidney. 
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    Briefly describe the events that occur during the luteal phase of the menstrual cycle.
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    Explain the elongation of giraffe’s neck according to the theories of Lamarck and Darwin. 
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    Give one function and one deficiency symptom of the following : 

    Magnesium

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    Define the following:

    (i) Parthenocarpy
    (ii) Root Pressure.

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    Give one function and one deficiency symptom of the following :

    Molybdenum

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    Define:

    (i) Peristalsis

    (ii) Multiple fruits

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