Complete the sentences about Neolithic age. Women in hunter-gatherer communities had fewer children because it was difficult to take care of babies while living a
life. On the other hand, women in agricultural communities could have more children because as they lived in
villages. This change was one of the ways in which
contributed to a rapid increase in human population.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.