If you roll a ball down a ramp, which factor will have the greatest effect on the amount of friction created?

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing