What is the independent variable in this experiment? a) temperature b) number of chirps c) number of crickets d) location of the laboratory

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

Discuss how the research in this article shows how new technology and experimental methods can lead to changes in theories.what information did you include in your answer? check all that apply.