The average distance between our star and earth is 149.6 million kilometers.
<u>Question 1</u>
The correct answer is: "The researchers administered a questionnaire to obtain their data without trying to influence an explanatory variable of the study".
An observational study is one in which the researcher observes the effect of a variable without manipulating the conditions that surround the exposure or the subjects who are exposed to it. In this example, he simply hands out questionaires to the 353 individuals that compose the sample drawn from the population of interest: 12-year old teenagers.
<u>Question 2</u>
The correct answer is: "a cohort study".
The researcher is interested on a population group where all the components share a common characteristic (12-year old) and therefore they all belong to the same cohort. Subsequenly, he evaluates the differences between the ones who have been exposed to the explanatory variable (having a video console in the bedroom) and those who have not.
Cologne, Strasbourg,Koblenz,Basel,Dusseldorf
Answer:
C) An individual's reproductive success depends in part on how the behavior is performed.
Explanation:
Darwin's most famous theory of evolution is the Natural selection which states as "Those organisms best adapted to their environment have a better chance of surviving and reproducing"
Natural selection is the process b which individuals with inherited characteristics well-suited for their environment leave more offspring on average than do other individuals. It involves the survival and reproduction of the fittest. An individual's reproductive success depends in part on how the behavior is performed is required for a behavioral trait to evolve by natural selection.
