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Name the insect pest that is killed by t...

Name the insect pest that is killed by the products of cryIAc gene. Explain how the gene makes the plant resistant to the insect pest.

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XII BOARDS PREVIOUS YEAR-XII BOARDS-SECTION-C
  1. Mention the product and its use produced by each of the microbes liste...

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  2. (i) Name the organism in which the vector shown in inserted to get the...

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  3. Name the insect pest that is killed by the products of cryIAc gene. Ex...

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  4. How do organisms like fungi, zooplanktons and bears overcome the tempo...

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  5. Explain the process of artificial hybridisation to get improved crop, ...

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  6. Explain the sex determination mechanism in humans. How is it different...

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  7. (a ) Trace the development ofmegaspore mother cell up to the formation...

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  8. (a) Draw a diagrammatic labelled sectional view of seminiferous tubule...

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  9. Explain the mechanism of sex determination in insects like Drosophila ...

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  10. (a) Mention any four strategies adopted by flowering plants to prevent...

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  11. Pollen banks are playing a very important role in promoting plant bree...

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  12. Draw a labelled diagram to show inter-relationship of four accessory d...

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  13. Compare in any three ways the chromosomal theory of inheritance as pro...

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  14. Explain the mechanism of DNA repication with the help of a replication...

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  15. (a) Write two differences between Homo erectus and Homo habilis. (b...

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  16. Name the group of bacteria involved in setting milk into curd. Explain...

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  17. Bee keeping practice is a good income generating industry. Write the d...

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  18. (a) Match the microbes listed under Column -A with the products mentio...

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  19. Describe the formation of recombinant DNA by the action of EcoRI. OR...

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  20. Two children, A and B aged 4 and 5 years respectively visited a hospit...

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