Use the drop-down menus to complete the statements. investigations allow for the control of variables and can be repeated.

investigations are usually less time-consuming and less expensive.

investigations make it possible to study a wide range of variable

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

The first step in treating water from a river or lake is usually

Effective community programs the individual, the community, organizations, and the government. select the sentence that shows a benefit to organizations. ryan and farah were discussing voluntary work. ryan was very keen to work on health-related issues. he knew that many districts had effective community programs. farah recently read a report about a local community program that reduce the rate of heart diseases by 30 percent. this reduced healthcare costs. local companies also saw productivity increases.