The body system seen here protects internal structures, provides support, and allows for movement. but this system does not work alone. in order for humans to move, this system must work together with the system.

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Long term exposure to waves can cause sunburns and skin cancer.

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale