The earth has magnetic north and south. how dose this us with evidence to support the theory of continental drift

List two modern organisms that have pentameral symmetry

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

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.