Q10

Francesco Redi challenged the idea that maggots arose spontaneously from rotting meat. A modern version of his experiment was set up as shown.
Which of the following is correct for this experimental set up?
A. The sealed jar improves the validity of the experiment.
B. The independent variable is whether the meat spoils or not.
C. The use of three jars improves the reliability of the experiment.
D. The dependent variable is the use of different covers for the jars.