I need help answering the following questions with at least 200 words in length

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1. Explain the meaning of “necessary and sufficient” in the context of causal relationships in epidemiology.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

2. Describe a frequent sequence of study designs which is used to address questions of etiology in community health today.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

3. Describe the guidelines for causation published by the U.S. Surgeon General.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

4. Summarize the U.S. Preventive Services Task Force (USPSTF) Levels of Certainty regarding net benefit of preventive services. What are the implications of the various USPSTF grades for practice?

Your response must be at least 300 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

5. Describe how mapping the human genome is helping to define the etiologic roles of environmental and genetic factors in disease.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

6. Explain how the occurrence of disease reflects an interaction between environmental and genetic factors. Provide at least one example of such interaction between genetics and environment.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

7. Explain how genetic markers are used to assess the genetic basis of disease. Provide at least one example for the use of genetic markers.

Your response must be at least 200 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations.

8. Study Figure 16-10 on page 296 of your textbook. What can you learn from this graphic? Discuss Schizophrenia in Biologic and Adoptive Relatives of Adoptees Who Became Schizophrenic.

Your response must be at least 300 words in length. You are required to use at least one outside source. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations