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How is snow-blindness caused in humans ?...

How is snow-blindness caused in humans ?

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The inflammation of cornea caused by a high dose of UV -B 1s known as snow-blindness.
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XII BOARDS PREVIOUS YEAR-XII BOARDS-SECTION-A
  1. Name and describe any three causes of biodiversity losses.

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  2. Mention the site where syngamy occurs in amphibians and reptiles respe...

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  3. How is snow-blindness caused in humans ?

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  4. Name one autosomal dominant and one autosomal recessive. Mendelian dis...

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  5. How is the action of exonuclease different from that of endonuclease ?

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  6. India has more than 50,000 strains of rice. Mention the level of biodi...

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  7. Mention the information that the health workers derive by measuring BO...

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  8. Name the enzyme involved in the continuous replication of DNA strand. ...

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  9. Offsprings derived by asexual reproduction are called clones. Justify ...

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  10. Write the genotype of (i) an individual who is carrier of sickle cell ...

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  11. Mention a characteristic feature and a function of zoospores in some a...

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  12. A human being suffering from Down's Syndrome shows trisomy of 21^(st) ...

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  13. Pea flowers produce assured seed sets. Give a reason.

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  14. British geneticist R.C. Punnett developed a graphical representation o...

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  15. State the two principal outcomes of the experiments conducted by Louis...

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  16. Name the layer of the atmosphere that is associated with 'good ozone'....

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  17. What are 'flocs', formed during secondary treatment of sewage ? OR ...

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  18. At what stage does the meiosis occur in an organism exhibiting haploid...

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  19. Mention two objectives of-setting up GEAC by our Government.

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  20. What are transgenic animals. Give an example.

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