Albert, a student researcher, varies the amount of food given to rats in an experiment to measure the effect on their learning behavior. In albert's study, the amount of food given is the independent variable.
An independent variable is under the control of the experimenter. Independent variable does not depend on the other variables involved in the experiment. Since the amount of food is varied, it is not depending on other variables like size of mice, weight, etc.
The energy that the hawk has taken isn't enough for another animal to get any benefit therefore the pyramid has a limitation.
Arthur si warm enough ti suportarla lige
They are composed of proteins. I cannot see the options but hopefully that answer is in one of them
