Which describes a frame of reference most likely to be used in high school physics lab motion experiments? A. distances measured from the center of Earth B. positions determined relative to the observer's center of gravity C. fixed x, y, and z axes with a zero point on the floor D. positions measured from a zero point on the moving object

i believe the answer would be b. hope it : )

make   gliitsh plesea   !

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.