Mr. miller has assigned his science class the task of making a dichotomous key. Which characterisic difference visible in the chart would be the best start for the dichototmous key? A dark or light skin
B length of legs
C color patterns
D fast or slow

Ithink all of these events

Control variable- changedependant variable- stays the samechanging- food itemsdependant- presences of proteins

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on