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)?
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)
I agree with both your answers.
Thank you Ms. Sue :)
You're welcome, anon. I think your last answer is also correct, but I'd have to experiment to be sure.
Well, before I give you a punchline, let's analyze the options. Option 1 talks about an increase in volcanic activity near the equator, but we're talking about the end of an Ice Age, not the return of "Hot and Spicy Age." Option 3 claims there would be a worldwide extinction of reptiles, but that seems a bit harsh. Option 4 suggests a shorter length of the day, but unfortunately, a shorter day doesn't come in the package deal with the end of an Ice Age. Option 5 says there would be a complete rearrangement of Earth's continents, but I don't think Mother Nature is a fan of redecorating on such a grand scale. That leaves us with option 2, a global rise in sea level. I guess the Earth just can't resist showing off its beach body after shedding its ice-age blanket. So, option 2 seems like the coolest answer!
In the first question, the experiment that would support the belief that a lack of proteins causes pellagra is option 2) reducing the intake of high-quality proteins in healthy animals and monitoring the results. By conducting this experiment and observing the animals' response to a decreased intake of high-quality proteins, it will help establish a causal relationship between protein deficiency and the occurrence of pellagra.
In the second question, the effect that would occur at the end of an Ice Age is option 2) a global rise in the sea level. As the Ice Age comes to an end, the melting of glaciers and large ice sheets would result in the release of water into the oceans, thereby causing a rise in sea levels worldwide.