Recent research has shown that the shortening of telomeres is not irreversible. Provide an overview of the research that provided this insight. Are there any limitations that need to be considered? Include a definition of telomeres in your response
What will be an ideal response?
Answer: Telomeres are the tips of chromosomes that shorten with each cell division. In one study, approximately 30 women with cervical cancer were randomly assigned to either a counseling group or a control group that received standard treatment. They were studied over four months and, not surprisingly, the counseling group had better immunity and better quality of life. They also had longer telomeres than they did at the start of the study. Limitations to consider are that this was a small sample of only women with a specific illness. A larger study including men and a wider range of illnesses would be needed to generalize results. In addition, these women were experiencing a high level of stress, which can shorten telomeres, so it is unclear if people who report lower levels of stress would see such a dramatic reversal.
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You have a friend who has a 12-month-old son and you have an 18-month-old son. You have been getting together each week for a couple of months for them to socialize and so that you can talk
Your friend is concerned that his son is not very advanced because your son systematically and deliberately separates his various toys into categories while he plays and his son is oblivious to any categories. What would you tell your friend? a. that his son should probably start going to a high-quality day care b. that his son will most likely also categorize when he is 18 months old c. that your son is very advanced since children generally do not categorize until they are at least 24 months old d. that infants are very different in their development
Which of the following is an advantage of cluster sampling over simple random sampling in many cases?
a. the error of estimation is lower b. the respondents may be closer together geographically c. it is more representative of the population d. it is a nonprobability sampling procedure e. the required sample size is smaller