2. What was the original hypothesis? 3. What was the manipulated (independent) variable and the ressponding (dependent) variable? 4. Write a statement that summarizes the results of the experiment. 5. How would Dr. Eijkman test his new hypothesis?
2. What was the original hypothesis? 3. What was the manipulated (independent) variable and the ressponding (dependent) variable? 4. Write a statement that summarizes the results of the experiment. 5. How would Dr. Eijkman test his new hypothesis?
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
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Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
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Chapter8: Dna Structure And Function
Section: Chapter Questions
Problem 1DAA: HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952...
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![Scientific Method In Action
The Strange Case of BeriBeri
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi.
Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure.
Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from
the blood of patients with beriberi. The injected chickens became sick. However, so did a group of
chickens that were not injected with bacteria.
One of the scientists, Dr. Eijkman, designed a new experiment based on his own observations. Before
the experiment, all the chickens had eaten whole-grain rice, but during the experiment, the chickens
were fed polished rice. Dr. Eijkman researched this interesting case and found that polished rice lacked
thiamine, a vitamin necessary for good health.
1. State the question or problem that Dr. Eijkman investigated.
2. What was the original hypothesis?
3. What was the manipulated (independent) variable and the ressponding (dependent) variable?
4. Write a statement that summarizes the results of the experiment.
5. How would Dr. Eijkman test his new hypothesis?
How Penicillin Was Discovered
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He
noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed
around the mold because all the bacteria that had grown in this area had died. In the culture dishes
without the mold, no clear areas were present.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F45f87f97-cb30-4a82-a505-d7841556ef8f%2F4617f1e4-f9cf-4123-96c6-4c715cd22223%2Fmygw7j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Scientific Method In Action
The Strange Case of BeriBeri
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi.
Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure.
Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from
the blood of patients with beriberi. The injected chickens became sick. However, so did a group of
chickens that were not injected with bacteria.
One of the scientists, Dr. Eijkman, designed a new experiment based on his own observations. Before
the experiment, all the chickens had eaten whole-grain rice, but during the experiment, the chickens
were fed polished rice. Dr. Eijkman researched this interesting case and found that polished rice lacked
thiamine, a vitamin necessary for good health.
1. State the question or problem that Dr. Eijkman investigated.
2. What was the original hypothesis?
3. What was the manipulated (independent) variable and the ressponding (dependent) variable?
4. Write a statement that summarizes the results of the experiment.
5. How would Dr. Eijkman test his new hypothesis?
How Penicillin Was Discovered
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He
noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed
around the mold because all the bacteria that had grown in this area had died. In the culture dishes
without the mold, no clear areas were present.
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