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CBSE Class 12th Biology Solved Practice Paper 2015

Dec 31, 2014 16:00 IST

    Find CBSE Class 12th Biology Studies Solved Practice Paper 2015. These Practices have been solved as per the standards followed by CBSE while solving their Practice Paper.

    A few Practices from this Set are given below:

    Q. What are the primary sex organs?

    Sol. Sex organs which produce gametes.

    Q. What is the importance of biofortification?

    Sol. Use of improved genetic technology to increase the amount of vitamin, minerals, protein, fat, Micronutrient and mineral content of plant is termed as biofortification.  

    Q. Biotechnologists refer to Agrobacterium tumifaciens as a natural genetic engineer of plants. Why?

    Sol. Insetition of vector (Agrobacterium tumifaciens) containing gene nematode specific gene into the host plant, whose DNA have the ability to produce both sens and antisens DNA in the host. The tow complementary sequence then form dsRNA which initiate synthesis of RNAi. These RNAi then blocks mRNA synthesis and leads to the death of pathogen.

    Q. Why banana is considered a good example of parthenocarpy?

    Sol. Banana is considered a good example of parthenocarpy because it produces seedless fruit in the absence of successful fertilization.

    Q. Give any two examples of evolution by anthropogenic action.

    Sol.  (a) Melanic form of peppered moth
           (b) Antibiotic resistant bacteria

    Q. Name the organism group of TL I

    Sol. Producer or primary producer

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