Vitamin E is implicated in the prevention of chronic diseases, such as cancer, cataracts, and cardiovascular disease, because Multiple choice question. protects nerve tissue. it can prevent oxidative damage. blocks the absorption of vitamin A. it regulates gene expression.

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.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Which description provides the best objective summary of the article in the passage?