CBSE Class 12 Biology Solved Question Paper 2016

Short Answer Type

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Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible?

Genetic diversity is represented by a large variety of mangoes in India. Genetic diversity is seen due to the difference in the soil of different areas, different agricultural practices and use of different horticulture techniques like grafting and breeding in different areas.

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    Excessive nutrients in a fresh water body cause fish mortality. Give two reasons

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    According to de-Vries what is saltation?

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    List the events that reduce the Biological Oxygen Demand (BOD) of a primary effluent during sewage treatment. 

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    State a difference between gene and an allele.

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    Sugggest a technique to a researcher who needs to separate fragments of DNA.

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    Discuss the role the enzyme DNA ligase plays during DNA replication.

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    Explain the significance of meiocytes in a diploid organism.

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    Suggest the breeding method most suitable for animals that are below average in milk productivity.

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    Name the causative organism of the disease amoebiasis. List three symptoms of the disease.

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