Rashan thought that he would be dramatic and impress his public speaking class with his speech on air pollution. He decided to use mice in a closed jar to illustrate how air pollution is slowly killing human beings. But during his speech, the jar fell off the desk and the mice escaped, distracting his audience and putting an abrupt end to his presentation. What guideline did Rashan ignore, with regard to using presentation aids?

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

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.