A student measures his pulse rate while he is watching television and records it. Then he walks to a friend’s house nearby and when he arrives, measures and records his pulse rate again. He and his friend decide to run to the mall a few blocks away. On arriving at the mall, the student measures and records his pulse rate once again. Finally, after sitting and talking for a half-hour, the student measures his pulse rate for the last time. Which graph best illustrates the expected changes in his pulse rate according to the activities

described above?

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.

How does the carbon cycle involve an exchange of carbon

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo