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.
The Plankton consist of microscopic plants (phytoplankton) and animals (zooplankton). On the smaller end of the spectrum exist bacteria (bacterioplankton) and viruses (virioplankton).Plankton also consist of the early life stages of much larger organisms, such as fish eggs and larvae (ichthyoplankton), which are both part of and dependant on the plankton itself.Plankton play a key role in the oceanic food web ...n the smaller end of the spectrum exist bacteria (bacterioplankton) and viruses (virioplankton). Plankton also consist of the early life stages of much larger organisms, such as fish eggs and larvae (ichthyoplankton), which are both part of and dependant on the plankton itself.