What are differences between a saturated and unsaturated

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

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

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