science

For many years pellagra was believed to be an infectious disease promoted by unsanitary conditions. it was common in sanatoriums and orphanages but only among the patients and not the staff. a study of the diets showed that suffers of pellagra rarely ate high quality proteins, such as in eggs, milk, and meat.introduction of these proteins into the diet cured pellagra. which of the following experiments would support the belief that a lack of proteins causes pellagra?


1) giving fruits that contains vitamin c to animals with pellagra
2)reducing the intake of high quality proteins in healthy animals and monitoring the results
3)inoculating healthy individuals with secretions from pellagra skin lesions
4)having healthy animals live in an unsanitary environment
5) moving animals with pellagra to a sanitary environment

Answer (2)?

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Which of the following effects would also occur at the end of an Ice Age?



1) an increase in volcanic activity near the equator
2) a global rise in the sea level
3) worldwide extinction of the reptiles
4) a shorter length of the day
5) a complete rearrangement of the Earth's continents

Answer is (2)?

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  1. Aspoon full of dry baking powder is added to glass of cold water.an identical amount was added to a glass of hot water. which of the following results will occur?

    1. bubbles will form first in the hot water
    2.bubbles would form first in the could water
    3.no difference would be observed between the reactions inside the glass.
    4.no bubbles would be formed in the cold water.
    5. no bubbles would be formed in the hot water


    Answer is (1)

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    posted by **anon**
  2. I agree with both your answers.

  3. Thank you Ms. Sue :)

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    posted by **anon**
  4. You're welcome, anon. I think your last answer is also correct, but I'd have to experiment to be sure.

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