Bacteria can obtain energy and nutrients by performing photosynthesis, decomposing dead organisms and wastes, or breaking down chemical compounds.
Bacteria can obtain energy and nutrients by establishing close relationships with other organisms, including mutualistic and parasitic relationships.
When you are sick your muscles shut down and you skeletal system helps keep you from turning into a blob.
I'm pretty sure that the constant in the scientific process can not be changed because it is constant. If constant isnt an option, a data record can not be changed.