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XII BOARDS PREVIOUS YEAR-XII BOARDS-SET-I
- Identify the type of the given ecological pyramid and give one example...
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- What' is genetic engineering List the steps in rDNA technology.
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- Draw a labelled diagram of the reproductive system in a human female.
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- Scientists have succeeded in recovering healthy plants from a diseased...
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- (i) Name the enzyme that catalyses the transcription of hnRNA. (ii)...
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- (i) Write the scientific names of the two species of filarial worms ca...
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- Name the genus to which baculoviruses belong. Describe their role in t...
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- Unambiguous, universal and degenerate are some of the terms used for t...
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- Water is essential for life . Write any three features both for plants...
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- How do organisms cope with stressful external environmental conditions...
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- (a) State the consequence if the electrostatic precipitator of a therm...
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- Give reasons why : (i) most zygotes in angiosperms divide only after c...
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- Draw a labelled diagram of LS. of an embryo of grass (any six labels)....
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- Describe the mechanism of pattern of inheritance of ABO blood groups i...
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- (a) Why is haemophilia generally observed in human males ? Explain the...
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- (i) Describe the characteristics a cloning vector must possess. (ii) W...
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- If a desired gene is identified in an organism for some experiments, e...
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- Why hnRNA is required to undergo splicing?
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- The microscoppiocl len grains of the past are obtained as fossils. Men...
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- How does colostrum provide initial proteetioh against diseases to new ...
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