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Diatoms are a type of unicellular plant with plastids that are often joined by a variety of cell populations into a wide variety of populations. The shape of diatoms is diverse. Diatoms are usually produced by a two-fold breeding method. After the split, in the original shell, each creates a new lower shell. The box surface and the bottom of the box are named upper and lower shell surfaces, respectively. The shell surface is curved and the part is called a shell sleeve. The upper and lower casings extend toward the middle and are called the connecting belts.
Diatoms belong to the large group of unequal flagellates. This group of species has both autotrophic organisms (such as gold algae, macroalgae) and heterotrophic organisms (such as water mold). The yellow-brown chloroplast is a feature of the unequal flagella. This chloroplast has four layers of film containing carotenoids and fucoidin. Diatom individuals usually have no flagella, but their male gametes have unequal flagella, while their flagella lacks hairs compared to other groups.
Diatoms are producers in the food chain. A major feature of diatoms is the cell wall of diatom cells overlying siliceous (mainly silica). Siliceous cell walls vary in texture and morphology, but are mostly symmetrically arranged. This arrangement can be used as the basis for classification and naming. But this symmetry is not completely symmetrical, because one side of the diatom cell wall is slightly larger than the other side so that it can fit together. The fossil remains show that diatoms originated in the early Jurassic period. Only the male gametes of the central diatom have flagella and can swim. Diatoms have long been an important indicator of environmental monitoring and are often used for water quality research. Classified as a class, the center has a central diatom and feather diatom. It is also an advantageous group of offshore.