Is it possible for technological advancements to have both positive and negative effects on the world

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

What processes take place before the mature mrna exits the nucleus?

Which material is commonly used as a culture medium for living cells