Question

page(s) 10-11 1.3. design an experiment using appropriate variables, treatments, and controls. robert koch verified the germ theory of disease in 1890 in experiments using rabbits. he first isolated a pathogen (bacillus anthracis) from a sick rabbit and noted that the organism was not present in healthy rabbits. bacillus anthracis is the causative agent of anthrax, which leads to illness and death in the rabbits. he next injected healthy rabbits with the strain. other rabbits may have been mock injected with a sterile solution. for this experiment, identify the independent variable, the dependent variable, the control group, and the treatment group. control group dependent variable treatment group independent variable rabbits that were mock injected rabbits that were injected with bacillus anthracis illness from bacillus anthracis injection with bacillus anthracis

Explanation:

Step1: Define independent variable

Injection with Bacillus anthracis

Step2: Define dependent variable

Illness from Bacillus anthracis

Step3: Define control group

Rabbits that were mock - injected

Step4: Define treatment group

Rabbits that were injected with Bacillus anthracis

Answer:

Independent variable: Injection with Bacillus anthracis
Dependent variable: Illness from Bacillus anthracis
Control group: Rabbits that were mock - injected
Treatment group: Rabbits that were injected with Bacillus anthracis