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The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.
A neon tetra can appear slightly plump in the belly due to having overeaten. Neon tetras need dim lighting, a DH less than one, about 5.5 pH, and a temperature of 75 °F (24 °C) to breed. There also needs to be a lot of tannins in the water. Neon tetras are old enough to breed at 12 weeks. [23]
Pie charts of typical human body composition by percent of mass, and by percent of atomic composition (atomic percent) Body composition may be analyzed in various ways. This can be done in terms of the chemical elements present, or by molecular structure e.g., water , protein , fats (or lipids ), hydroxyapatite (in bones), carbohydrates (such ...
Also, its body is slimmer than that of the neon tetra. It grows to a maximum overall length of about 3.5 cm (1.4 in). Like the other Paracheirodon species, the green neon tetra is kept as an aquarium fish, but it is less commonly seen than either the neon tetra or the cardinal tetra. P. simulans is also sometimes called the blue or false neon.
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The black neon tetra (Hyphessobrycon herbertaxelrodi) is a freshwater fish of the characin family of the order Characiformes. It is native to the Paraguay basin of southern Brazil . They are often found in the aquarium trade.
On average, humans consume 0.3 milligrams of tin per day. There are 30 milligrams of tin in a typical 70-kilogram human. [18] Lead has no known biological role, and is in fact highly toxic, but some microbes are able to survive in lead-contaminated environments. Some plants, such as cucumbers contain up to tens of parts per million of lead ...
The flame tetra (H. flammeus) is bred in large numbers in captivity and common in the aquarium trade, but rare in the wild. [5] [6]Most of the 144 species in the genus have not been rated by the IUCN Red List as a threatened, but many species have small distributions and at least three, H. flammeus, [5] H. coelestinus and H. duragenys are classified as endangered. [7]