What kind of cell has a large, central, vacuole

What type of cell is produced after fertilization occurs and the gametes combines ?

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

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