2. which one of the following is a characteristic of cancer cells? a. they result in uncontrolled growth. b. they have a specialized structure and function. c. they're usually either nerve cells or cardiac muscle cells. d. they can't travel to other parts of the body.

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.

Which characteristics are typical of a human population in the postindustrial stage?

What organ is the first to receive nutrients that have been absorbed from the digestive tract?