What conditions will you be viewing the elodea leaf in?

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

The response is the basis for vaccination. primary secondary tertiary none of the above

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