Why do cells need to use transport proteins to function? a. transport proteins surround the nucleus for protection. b. transport proteins prevent the cells from dissolving. c. carbohydrates cannot pass directly through the cell membrane. d. nonpolar molecules cannot pass through the cell membrane.

The use of dna as evidence in criminal investigations became possible because of the

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 of the following is a way that minerals are used? a. industry construction technology d. all of the above