1 Its cost, on average, is $650, compared to $400 for take-home trays and under $100 for over-the-counter bleaching trays or whitening strips. 2  Results can be unpredictable, depending on factors such as age, heredity and the type of staining that is present.
Plankton (singular plankter) are a diverse group of organisms that live in the water column of large bodies of water and that cannot swim against a current. They provide a crucial source of food to many large aquatic organisms, such as fish and whales.
ARTICLE INDEX. Plankton: doing more than just drifting through. Plankton is found all over the planet â from the polar-regions to the tropics, freshwater lakes to the sea. Plankton are mostly small organisms, drifting along with the currents and unable to swim against the waves.RTICLE INDEX. Plankton: doing more than just drifting through. Plankton is found all over the planet â from the polar-regions to the tropics, freshwater lakes to the sea. Plankton are mostly small organisms, drifting along with the currents and unable to swim against the waves.