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What is an allergy? Name the two chemica...

What is an allergy? Name the two chemicals released by mast cells in the body during allergy.

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Allergy : The exaggerated response of the immune system to certain antigens present in the environment. Histantine and Serotonin
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OSWAAL PUBLICATION-SOLVED PAPER II PUC ANNUAL EXAMINATION 2019-PART-B
  1. Mention four traits for which plant breeding is done.

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  2. With an example, explain the convention for naming restriction endonuc...

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  3. A prey develops defence against predator. Justify the statement with t...

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  4. Mention any two mechanisms how human body compensates low oxygen avail...

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  5. What is embryogenesis? Mention two important events that occur during ...

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  6. Define point mutation. Give an example for point mutation.

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  7. What are the conclusions drawn by T.H. Morgan from the crossing experi...

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  8. What is an allergy? Name the two chemicals released by mast cells in t...

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  9. Mention four traits for which plant breeding is done.

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  10. With an example, explain the convention for naming restriction endonuc...

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  11. A prey develops defence against predator. Justify the statement with t...

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  12. Mention any two mechanisms how human body compensates low oxygen avail...

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  13. What is embryogenesis? Mention two important events that occur during ...

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  14. Define point mutation. Give an example for point mutation.

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  15. What are the conclusions drawn by T.H. Morgan from the crossing experi...

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  16. What is an allergy? Name the two chemicals released by mast cells in t...

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  17. Mention four traits for which plant breeding is done.

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  18. With an example, explain the convention for naming restriction endonuc...

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  19. A prey develops defence against predator. Justify the statement with t...

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    |

  20. Mention any two mechanisms how human body compensates low oxygen avail...

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    |