In addition to serving as waterproof coverings or as parts of biological membranes

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home. what is 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

Wich level of organization includes all the other levels or organizations

Moving down the ramp from 6 meters to