Please help! Hurry!

Francesco Redi conducted the following experiment.

Jars of meat with covers did not have maggots.

Jars of meat with no covers did have maggots.

What was the dependent variable in Redi's experiment?
A. the flies
B. the jar covers
C. the smell of the rotting meat
D. the number of maggots on the meat

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.