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.
Noun. 1. zooplankton-animal constituent of plankton; mainly small crustaceans and fish larvae. animal, animate being, beast, creature, fauna, brute-a living organism characterized by voluntary movement. plankton-the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water.lankton that consists of animals, including copepods, rotifers, jellyfish, and the larvae of sessile animals such as coral and sea anemones. zoâ²oÂ·plankÂ·tonâ²ic (-tÅnâ²Ä­k) adj.