A scientist is designing an investigation to study which color of peppered moth would have a higher survival rate in his neighbo
rhood. What is most likely the test variable (independent variable) in this investigation? A Neighborhood environment
B Survival rate
C Number of predators
D Colors of peppered moths
In an experimental set up, an independent variable can be changed either by it's own or manually. This change can be observed over the dependent variable. The changes in the dependent variable can be observed so as to determine the outcome of the experiment.
The independent variable is the test variable of the experiment and the dependent variable is the experimental variable.
According to the condition, the color of the peppered moths is the independent variable, as it's affect is to be determined over the survival rate of the peppered moths which is the result of the experiment. The color may vary among the peppered moths.
The carnivore population would also increase because there would be a
larger food-source for carnivorous so more of them would be able to
survive. The carnivore population would go up as well because they have more food
(herbivores) to eat. There would be more food to sustain the carnivore
population.
