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Selenium, which is an essential element for animals and prokaryotes and is a beneficial element for many plants, is the least-common of all the elements essential to life. [3] [63] Selenium acts as the catalytic center of several antioxidant enzymes, such as glutathione peroxidase, [11] and plays a wide variety of other biological roles.
Biology: part of the amino acids cysteine and methionine, and of all polypeptides, proteins, and enzymes that contain them See also: Sulfur assimilation. Agriculture: fertilizers, fungicides, and pesticides 17: Cl: Chlorine 3: 17 18: Ar: Argon 3: 18 19: K: Potassium 4 1: Animals: neuron function, electrolyte balance See also: Potassium in biology.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
The following is a list of the classes in each phylum of the kingdom Animalia. There are 107 classes of animals in 33 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by ...
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
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A Minnesota couple has reportedly been sentenced to four years after they locked their children in cages for "their safety." Benjamin and Christina Cotton from Red Wing, were sentenced by a ...
Minecraft is a media franchise developed from and centered around the video game of the same name.Developed by Mojang Studios (formerly known as Mojang AB) and Xbox Game Studios, which are owned by Microsoft Corporation, the franchise consists of six video games, along with various books, merchandise, events, and an upcoming theatrical film.