Hemoglobin from two species is compared. on the long protein chains, there are three locations where the amino acids are different. where would you place the common ancestor of the two species on the "tree of life," and why?

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?

Which hypothesis most likely explains the results at 60°c and 70°c

Under capitalism, the allocation of goods and services is determined by consumers. the government. businesses. free market forces.