May 23, 2018 · Diatoms Algae are a very diverse group of simple, nucleated, plant-like aquatic organisms that are primary producers. Primary producers are able to utilize photosynthesis to create …

Jun 11, 2018 · Bacillariophyta A phylum of algae comprising the diatoms. These marine or freshwater unicellular organisms have cell walls (frustules) composed of pectin impregnated with silica and …

May 18, 2018 · diatom A microscopic alga, belonging to the division Bacillariophyta, in which the cell wall (frustule) is composed of silica and consists of two halves, one of which overlaps the other like …

Jun 8, 2018 · Chrysophyta (krəsŏf´ətə), phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista [1] consisting of the diatoms [2] (class Bacillariophyceae), the golden, or …

Others remain attached to submerged surfaces. One gallon of water may contain millions of diatoms; their abundance makes them important food sources in aquatic ecosystems. When diatoms die, their …

dinoflagellates A division (Dinoflagellata) of protists that are heterotrophs but closely allied to brown algae and diatoms (they are sometimes classified as algae). Many have brown or yellow …

Jun 11, 2018 · Diatoms are also the most abundant algae in the open ocean and responsible for about one-quarter of all the oxygen gas produced on the earth each year. Diatom populations often bloom …

May 8, 2018 · diatomaceous earth (kieselguhr) A deposit composed of fossil diatoms (Bacillariophyceae), which is mined for many industrial uses: as a mild abrasive in metal polishes, as …

Jun 27, 2018 · Protista (Protoctista) A kingdom in the domain Eucaryota that comprises single-celled, eukaryotic organisms (see eukaryote) that may resemble animals or plants. Naked and shelled …

May 21, 2018 · The Amoeba, for example, is capable of detecting chemicals given off by potential food particles such as diatoms , algae, bacteria or other protozoa. As the cell wall has no definite shape, …