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CBSE Class 12 Biology Set III Solved Question Paper 2012

Jan 19, 2013 12:35 IST

    CBSE Biology Set- III Solved Question Paper 2012, Given Here.

    Here you can find Biology Solved Question Paper. Save your time and take the help while solving the Biology question paper set-III this paper will help you in scoring exceptionally well mark in Biology paper.

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    Some solved questions of this question paper are given here

    Q. How is it possible in oxalis and viola plants to produce assured seed-sets even in the absence of pollinators?
    Answer. Flowers of oxalis and viola plants are intersexual; they get pollinated through process of cleistogamy.

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    Q. Why do pollen grains of some flowers trigger ‘sneezing’ in some people?
    Answer. Pollen grains of many species cause several allergies and bronchial affliction.

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    Q. A garden pea produced round green seeds. Another of the same species produced wrinkled yellow seeds. Identify the dominant traits.
    Answer. Round yellow is dominant traits.

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    Q. Why earthworm is called detritivore?
    Answer. Due to earthworm feed upon decaying leaves and organic matter mixed with soil.

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    Q. Mention the location and function of leydig cells in human?
    Answer. Leydig cells are located in seminiferous tubules in testis. Its function is to synthesise and secrete testicular hormone called androgen.

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    Q. Why is south Indian sugarcane preferred by agriculturalist?
    Answer. South Indian sugarcane has thicker stems and higher sugar content.

    CBSE Class 12 Biology Set- I Solved Question Paper 2012

    Q. Comment on the similarity between the flippers of dolphin and penguins with reference to evolution.
    Answer. It is example of convergent evolution; they perform similar function of different structure called analogous structure.

    CBSE Class 12 Biology Set-II Solved Question Paper 2012

    Q. Mention the effect of global warming on the geographical distribution of stenothermals like amphibians.

    Answer. The geographical distribution of stenothermals like amphibians is controlled by temperature and global warming affects the temperature to rise.

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