predict: one ecosystem that has been studied a great deal in recent years is a coral reef, an undersea ecosystem rich in marine animals living in or around tropical corals. name one abiotic and one biotic factor present in coral reefs (hint: look at the picture above)

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.