Residents of three villages with three different types of water supply were asked to participate in a study to identify individu
als who were cholera carriers. Because there had been several recent deaths due to cholera, almost everyone participated in the study and underwent examination and testing. The proportion of residents in each village who were carriers was computed and compared. What is the proper classification for this study? a. Cross-sectional studyb. Case-control studyc. Prospective cohort studyd. Retrospective cohort studye. Experimental study
The correct answer is option a. "Cross-sectional study".
Explanation:
A cross-sectional study is a type of observational study used in medical and social researches. Cross-sectional studies are characterized by the analysis of data that comes from a population at a specific point of time. A research that involves studying the incidence of cholera carriers at three different villages with three different types of water supply, is an example of a cross-sectional study.
I believe the correct answer from the choices listed above is option D. The sentence that best explains why the plant grows more slowly would be the <span>plant has less cholorphyll to produce energy. Since it can be found in the leaves of the plant. Hope this answers the question.</span>
II and III only. The fungus is a heterotroph, since it's not making it's own food, but it's also a Saprotroph (since it externally digests dead organic materials; saprotrophs are a special subset of heterotrophs).
