The element has about 47 protons
Answer:
The cell is eukaryotic because it contains mitochondria.
nucleus
Explanation:
I think it is C, but I could be wrong because I am taking an educated guess.
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.
