The arrangement of the pelvic and pectoral fins close together gives advanced ray-finned fish an advantage in​

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

This is so important ugh its 25 points

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other