How might energy and matter leave the ecosystem

What is the primary goal of human communities?

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

The data below simulate what happened to peppered moths in england after the industrial revolution which statement best describes the process that produced one of the emding populations of moths ?light colored moths were selected for on light colored trees