Question

dr. freedia conducted a study in which she randomly assigned mice to one of two conditions. one group of mice was moved to a new cage every week for 8 weeks, while the other group of mice was allowed to remain in the same cage during this period. dr. freedia measured the level of stress hormones in the mices bloodstream at the beginning and at the end of the experiment. she also measured the level of stress hormones in the mices offspring, and she found that the offspring of the mice that were exposed to frequent housing changes had higher levels than did the offspring of the mice that were not exposed to frequent housing changes. 8 opción múltiple 1 punto which of the following statements about this study is most accurate? by randomly choosing mice from the entire population of mice, dr. freedia can ensure that her results regarding the effects of natural selection apply to all mice. by randomly placing mice into the two groups of the study, dr. freedia can explain her results based on evolution. by randomly choosing mice from the entire population of mice, dr. freedia can explain her results based on the effects of epigenetics rather than other factors. by randomly placing mice into the two groups of the study, dr. freedia can explain her results based on the effects of epigenetics rather than other factors. 9 opción múltiple 1 punto based on the results of this study, a journalist wrote an article encouraging parents to avoid moving so as not to increase their childrens and future grandchildrens stress hormone levels. what is the biggest problem with this reasoning? dr. freedia did not employ random assignment, so the journalist cannot generalize the results to the larger population. dr. freedia employed a non - experimental design in her study, so the journalist is unable to infer a cause and effect relationship between the variables. dr. freedia did not employ random selection, so the journalist cannot generalize the results to the larger population. dr. freedia conducted her study on mice, so the results may not generalize to the population of humans.

Explanation:

• Pregunta 8: Al asignar aleatoriamente los ratones a los dos grupos del estudio, Dr. Freedia está intentando controlar factores variables y explicar los resultados basados en los efectos de interés, en este caso, posiblemente epigenéticos. La selección aleatoria de la población general no asegura los efectos de la selección natural o epigenéticos de manera directa como se describen en las otras opciones.
• Pregunta 9: Los ratones son diferentes a los humanos en muchos aspectos biológicos y psicológicos. Por lo tanto, los resultados de un estudio en ratones no necesariamente se pueden generalizar a la población humana.

Answer:

1. By randomly placing mice into the two groups of the study, Dr. Freedia can explain her results based on the effects of epigenetics rather than other factors.
2. Dr. Freedia conducted her study on mice, so the results may not generalize to the population of humans.