ISC Class 12 Biology Solved Question Paper 2008

Short Answer Type

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State the contribution of each of the following scientists :

Blackman

Blackman was the first who pointed out that at least one of the reactions involved in photosynthesis is of purely chemical type. This reaction is known as Blackman reaction and also dark reaction, since it does not require light and therefore may take place in either the light or the dark.
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    Mention one significant difference between each of the following :

    Anticlinal and Periclinal cell division

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    (a) Mention one significant difference between each of the following :

    Photo-oxidation and Photorespiration

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    Mention one significant difference between each of the following :

    Ontogeny and Phylogeny

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    Mention one significant difference between each of the following :

    Ureotelism and Uricotelism

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    State the contribution of each of the following scientists :

    Charles Darwin

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    Explain why :

    A large percentage of carbon dioxide forms carbonic acid within the RBCs whereas very little carbon dioxide forms carbonic acid in the plasma.

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    The blind spot in the eye is devoid of the ability of vision.

    Explain Why?

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    Explain why :

    Salt is added in excess to pickles.

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    Mention one significant difference between each of the following :

    Tubectomy and Vasectomy

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