Which fact is correct about most food chain? Consumers will always depend on producers for food.

Ecological problems are reduced by establishing a clear food chain order.

Consumer and producers belong to completely unrelated food chains.

Producers always depend on consumers for food.

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Think about the items and services that you and your family buy or consume. what causes you to pay the prices that you do for these goods and services? what determines the price that's on the price tag? what goes into determining, or setting, that price? consider all the possible elements that could influence the prices you pay.

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.