Vitamin A deficiency is the leading cause of blindness worldwide. Complete sentence about the role of vitamin A in vision with the appropriate term: In addition to retinoids, carotenoids are also important for proper vision. Higher carotenoid content in the eye is associated with lower risk of , a form of blindness in which the detailed sight in the center of the field of vision is lost. Carotenoids are also beneficial in the prevention of , a condition in which the lens of the eye becomes cloudy.

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health

Social sciences are the observable facts or events that involve human society. select the best answer from the choices provided t f

Original source material when instructors are creating discussion board activities for online courses, at least two questions must be answered. first, what is the objective of the discussions? different objectives might be to create a "social presence" among students so that they do not feel isolated, to ask questions regarding assignments or topics, or to determine if students understand a topic by having them analyze and evaluate contextual situations. based on the response to this question, different rules might be implemented to focus on the quality of the interaction more so than the quantity. the second question is, how important is online discussions in comparison to the other activities that students will perform? this question alludes to the amount of participation that instructors expect from students in online discussions along with the other required activities for the course. if a small percentage of student effort is designated for class participation, our results show that it can affect the quality and quantity of interactions. references: moore, j. l., & marra, r. m. (2005) a comparative analysis of online discussion participation protocols. journal of research on technology in education, 38(2), 191-212.student version; according to moore and marra's (2005) case study, which observed two online courses, students in the first course implemented a constructive argumentation approach while students in second course had less structure for their postings. as they stated, when instructors create online discussion board activities, they must answer at least two questions. these questions are: "what is the objective of the discussions? " and "how important are online discussions in comparison to the other activities that students will perform? " according to their findings, the discussion activities that were designed based on the answers to these questions can influence the quality and quantity of interactions (moore & marra, 2005).references: moore, j. l., & marra, r. m. (2005) a comparative analysis of online discussion participation protocols. journal of research on technology in education, 38(2), 191-212.is it word for word plagiarismparaphrasing plagiarism not plagiarism