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Explain the following terms a) Nitrog...

Explain the following terms
a) Nitrogen fixation b) Nitrification

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CPC CAMBRIDGE PUBLICATION-MODEL QUESTION PAPER -1-ANSWER THE FOLLOWING IN SENTENCE
  1. Write the chemical formulae of the following: a) Magnesium chloride ...

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  2. Define valency by taking examples of silicon and oxygen .

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  3. What are plasma membrane ? What are their functions ?

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  4. Name the following: a) Tissue that forms the inner lining of our mou...

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  5. How do gymnosperms and angiosperms differ from each other?

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  6. State the difference in balanced and unbalanced force.

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  7. A battery lights a bulb. Describe the energy changes involved in the ...

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  8. Define amplitude , time period and frequency of sound wave.

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  9. Give the difference between acute disease and chronic disease.

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  10. What are biogeochemical cycles ? Name the gas that is incorporated int...

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  11. What is genetic manipulation? how it is useful in agricultural practic...

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  12. What are the benefits of cattle farming?

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  13. Give the common methods of transmission of diseases.

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  14. Explain the following terms a) Nitrogen fixation b) Nitrification

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  15. What is the physical state of water at (a) 25^(@)C, (b) 0^(@)C, (c) 10...

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  16. Calculate the number mass of following substance . a) Ethyne , C2 ...

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  17. Differentiate between parenchyma collenchyma and sclerenchyma on the b...

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  18. Differentiate between striated unstriated and cardiac muscles on the b...

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  19. What are the advantages of classifying organisms ?

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  20. A bullet of mass 20 g is horizontally fired with a velocity 150 m/s fr...

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