Function? Infer When cells release ligands, they are sent through
the bloodstream to every area of the body. Why do you
think that only certain types of cells will respond to a
particular ligand?
Provide Examples What are two ways in which exocy-
US
O
HD

What is the mrna strand that would be copied from this dna strand

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

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?