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XII BOARDS PREVIOUS YEAR-XII BOARDS-SECTION-B
- A recombinant DNA is formed when sticky ends of vector DNA and foreign...
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- (i) Mention the number of primers required in each cycle of polymerase...
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- Define the term 'health'. Mention any two ways of maintaining it.
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- Why does a doctor administer tetanus antitoxin and not a tetanus vacci...
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- Giving two reasons explain why there is more species biodiversity in t...
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- Name an opioid drug and its source plant. How does the drug affect the...
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- Mention the major cause of air pollution in metro cities. Write any th...
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- How did Eli Lilly synthesis the human insulin ? Mention one difference...
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- Placenta acts as an endocrine tissue. Justify.
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- Differentiate between menarche and menopause.
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- List the features that make a stable biological community.
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- Mention how e-waste is produced and disposed off. Write the solution f...
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- Differentiate between major structural changes in the human ovary duri...
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- Alien species are a threat to native species. Justify taking example o...
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- Explain giving reasons the cause of appearance of peaks 'a' 'b' in th ...
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- Explain the zygote intra fallopian transfer technique ZIFT. How is int...
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- Name the organic materials the exine and latine of an angiosperm polle...
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- i)Name the scientist who suggested that the genetic code should be mad...
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- How can healthy potato plants to be obtained from a desired potato var...
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- What is bio-piracy? State the initiative taken by the Indian Parliamen...
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