The photo shows a rollercoaster assume that the system is close which rollercoaster has the wisp potential energy due to gravity

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?

Which of these is a provisioning service people get from the ocean

What is one affect on the australian environment due to the introduction of non-native european rabbits