Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
9th Edition
ISBN: 9780134442778
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 27, Problem 19TYK
Summary Introduction
To design: An ethical and an effective experiment for testing the vaccine developed against AIDS.
Introduction:
AIDS stands for acquired immunodeficiency syndrome. It is caused by HIV (human immune deficiency virus). It attacks the Thelper cells which are the immune cells that bring the information about the invasion of any organism in our body. They also form a memory of the attacking sites or the epitopes of the invading organism and thereby save us from the attack of various harmful organisms. HIV is a retro-virus that containsRNA as their
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comprehension) A scientist hypothesized that her vaccine would stimulate the immune system to attack melanoma (skin cancer) tumors and reduce their growth. To test the hypothesis, 100 melanoma patients were injected with the vaccine in a saline solution (Group A) and 100 melanoma patients were injected with only the saline solution
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Chapter 27 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
Ch. 27 - This graph plots the rise and fall of pituitary...Ch. 27 - Turns into the corpus luteum a. vas deferens b....Ch. 27 - a. vas deferens b. prostate gland c. endometrium...Ch. 27 - Prob. 4TYKCh. 27 - Prob. 5TYKCh. 27 - Site of human gestation a. vas deferens b....Ch. 27 - Prob. 7TYKCh. 27 - Secretes seminal fluid a. vas deferens b. prostate...Ch. 27 - Prob. 9TYKCh. 27 - After a sperm penetrates an egg, it is important...
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- Some people suffer terribly from certain incurable diseases. Can scientific methods be used to develop drugs that could end a person’s life? Can scientific methods be used to decide whether it is right or wrong to use such drugs?arrow_forwardObservation: Students on a university campus notice that the freshly squeezed mango juice ferments faster than the freshly made lime juice even though they are made by the same vendor, using the same method of juice extraction, and kept at the same temperature. Write a simple hypothesis, null hypothesis and alternative hypothesisarrow_forwardLaboratory Medicine Science question: A tech is running an antibody screen on a patient with a suspected anti-C. On cells that are C+ c+, there is no reaction, and on cells that are C+ c- the tech can sometimes get a weak reaction detected microscopically. What would you recommend to the tech in order to help them complete their work?arrow_forward
- Why do scientists design experiments to disprove the hypothesis they are testing instead of trying to prove that the hypothesis is correct?arrow_forwardFigure 1.18 In the example below, the scientific method is used to solve an everyday problem. Which part in the example below is the hypothesis? Which is the prediction? Based on the results of the experiment, is the hypothesis supported? If it is not supported, propose some alternative hypotheses. 1. My toaster doesn’t toast my bread. 2. Why doesn’t my toaster work? 3. There is something wrong with the electrical outlet. 4. If something is wrong with the outlet, my coffeemaker also won’t work when plugged into it. 5. I plug my coffeemaker into the outlet. 6. My coffeemaker works.arrow_forwardDesign a test (or series of tests) to support or refute this hypothesis: People who have no family history of high blood pressure (hypertension) but who eat a diet high in salt are more likely to develop high blood pressure than people with a similar family history but whose diet is much lower in salt.arrow_forward
- The scientific method is the process that scientists use to find out new information. It involves a question, a hypothesis, a prediction, collecting data, and analyzing that data to make a conclusion. How would you use the scientific method to answer this question: Do mice live longer when they are fed high-sugar diets?arrow_forwardThink of a common saying, perhaps something your family used to say to you, that is health-related (like you must not swim for 30 minutes after you eat, or you’ll get a stomach ache, or if you go outside with wet hair, you’ll catch a cold). What information you would need to have in order to support or refute these claims. For example, what questions would you need to investigate?arrow_forwardIn the modern era science is based on?arrow_forward
- Consider an experiment in which subjects are given a pill to test its effectiveness in reducing the duration of a cold. Which of the following is the best way to treat the control group? (a) Give the control group two pills instead of one. (b) Do nothing with the control group. (c) Give the control group a pill that looks like the test pill but does nothing. (d) Let the control group choose whether or not to take any pills. (e) Expose the control group to the cold virus.arrow_forwardExplain how Darwin’s theory of evolution via natural selection was influenced by the work of scientists that preceded him. Highlight the contribution of three scientists mentioned in the text / slides in your response.arrow_forwardTesting the question Examine the following questions and decide which of them you think can be answered by scientific methods. If the question can be answered via scientific methods, then put a ‘yes’ next to the question. If the question can’t be answered via scientific methods put a ‘no’ next to it and explain why it can’t be. What is the cause of COVID-19? What is the best recipe for cornbread? Will food from Chipotle be better for cardiovascular health than food from Taco Bell? Are serial killers evil by nature? How effective are extracts of citronella plants as insect repellants? Should we clone endangered species to prevent them from going extinct? Do students who are late for class have grades as good as prompt students?arrow_forward
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