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Draw and label the parts of the head reg...

Draw and label the parts of the head region only of a human sperm.

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XII BOARDS PREVIOUS YEAR-XII BOARDS-SET 1 [COMPTT]
  1. Write the level of biodiversity represented by a mangrove. Give anothe...

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  2. Name the two gases contributing maximum to the green house effect.

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  3. Draw and label the parts of the head region only of a human sperm.

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  4. What is amniocentesis? How is it misused ?

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  5. Rearrange the following in increasing order of evolution? Gnetales, ...

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  6. Differentiate between active immunity and passive immunity.

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  7. Differentiate between outbreeding and outcrossing.

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  8. Name two groups of organisms which constitute 'flocs'. Write their inf...

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  9. why is making cells competent essential for biotechnology experiments?...

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  10. Human insulin when synthesised in the body needs to be processed befor...

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  11. Write any two ways how genetically modified plants are found to be use...

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  12. Provide two reasons that make the cound of prokaryotic species difficu...

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  13. Explain how does the inflow of large amount of nutrients like phosphat...

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  14. How is apomixis different from parthenocarpy ?

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  15. Describe any two modes by which apomictic seeds and be produced.

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  16. Why is haemophilia rare in human females ? Mention a clinical symptom ...

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  17. What are the transcriptional products of RNA polymerase III?

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  18. Differentiate between 'Capping' and 'Taling'.

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  19. Expand hrRNA.

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  20. Giving three reasons, write how Hardy-Weinberg equilibrium can be affe...

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