Yuri is working with a chemical in lab. This chemical is composed of three phosphate groups, adenine base, and a sugar known as ribose. He is working with:.

According to the passage a mound is

Balanced rock sits on a thin spike of rock in a canyon what forces keep the rock balanced on its tiny pedestal

At work claire has a deadline that is rapidly approaching as she works she finds that she is doing more work in a shorter amount of time than usual she thinks more quickly and her senses and memory are sharper what is responsible for claire working more efficiently