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The article "Teenage Physical Activity Reduces Risk of Cognitive Impairment in Later Life" (Journal of the American Geriatrics Society [2010]) describes a study of more than 9000 women from Maryland, Minnesota, Oregon, and Pennsylvania. The women were asked about their physical activity as teenagers and at ages 30 and 50. A press release about this study (www.wiley.com) generalized the results of this study to all American women. In the press release, the researcher who conducted the study is quoted as saying Our study shows that women who are regularly physically active at any age have lower risk of cognitive impairment than those who are inactive but that being physically active at teenage is most important in preventing cognitive impairment. Answer the following four questions for this observational study.
a. What is the population of interest?
b. Was the sample selected in a reasonable way?
c. Is the sample likely to be representative of the population of interest? d. Are there any obvious sources of bias?
In cats, the X-linked allele O converts the black pigment found in the fur into an orange pigment. Heterozygous females are mosaics of orange and black pigmented fur.
Excessive alcohol consumption with increase the ratio of NADH/NAD+. This will directly inhibit which enzyme in the TCA cycle, A three year-old male presents to the emergency room with hypoglycemia
What is the main ingredient in street meth? Where is "ingredient" it made? What is the DEA doing to slow down production of street meth?
List the steps of the complement fixation test. include diagrams for each step, contrasting the results for a positive sample versus a negative?please help me.
How do we call insect which are responsible for transmitting diseases?
The patient offers the subjective symptoms of paresthesias and pain in the lateral three and one-half digits of her right hand.
How can altering ice nucleation protein production yield a bacterial strain useful to agriculture? Explain the logic and how this works.
Objective: Discuss a disease, condition or syndrome affecting movement, sensation, or mental function or a type of traumatic injury and current research, events, or interesting facts about the disease/condition/syndrome/injury.
Determine which of the following statements about DNA replication is NOT correct? Starting with 15N15N DNA, and after TWO generations in the 14N medium, Escherichia coli cells will contain
Name a process that occurs when DNA is released by a broken or lysed bacterium is taken up by another bacterium through its cell membrane giving this bacterium new traits
The argument that the widespread commercial use of antiseptics and disinfectants can hurt American health is in part due to the microbial resistance to antibiotics
How many nucleotide changes were in the first codon position? How many of these altered the encoded amino acid? Why is there a difference between amino acid % identity and nucleotide percent identity?
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