What is the purpose of the cell membrane? A. to make protein molecules to help with almost every cellular process
B. to let harmful things in the cell
C. to make antibodies.
D. lets things enter or exit the cell

Forensic nursing is a medical-specialist career that grew out of a response to divorce in society. true false

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?