BASIC ANALYSIS PRACTICE

 

In a scientific investigation there are three types of variables. The independent (manipulated) variable is the variable that is changed by the investigator. The dependent (responding) variable is the variable that may be affected as a result of the change. The controlled variable is the variable in the investigation that is not changed and therefore, remains constant.

 

1. What is the independent variable in pot A?

 

2. What is the dependent variable in pot B?

 

Cause-and-effect inferences can be made in an experimental design because a. The researcher manipulates both the independent and dependent variables b. The researcher controls the dependent variable throughout the experiment c. The researcher directly controls or manipulates changes in the independent variable d. Participants are systematically assigned to experimental conditions.

1. Define the term Independent Variable.

2. Define the term Dependent Variable.

3. How many independent variables should be included in an experiment? Why?

4. What does ‘transgenic’ mean with respect to Bt corn?

5. Which cells in the corn plant will produce the Bt cry protein?