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What are the nitrogenous bases belonging to the pyrimidine group?

Nitrogenous bases are categorized by their chemical structure. The atoms in cytosine, uracil and thymine arrange themselves in a single ring. Guanine and adenine are larger bases with atoms arranged in a double ring.\nNucleotides are composed of a sugar, a phosphate and a nitrogenous base. Each nucleotide links with another through a sugar and phosphate pairing to create one side of DNA. Cytosine bonds with guanine, and thymine bonds with adenine to create a double-stranded, ladder-shaped structure. The arrangement of the nitrogenous bases correlates to the type of genetic information stored, ..

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What is the mission of the National Audubon Society?

The National Audubon Society has been instrumental in protecting the Arctic National Wildlife Refuge and other fragile habitats, in recovering the endangered California Condor and Brown Pelican, in the ongoing restoration of Long Island Sound, Everglades and Louisiana coast and in the conservation of the Sagebrush ecosystem of the American West.\nWith 22 state programs, 41 centers and over 500 local chapters, The National Audubon Society puts a strong emphasis on educating the public about conservation issues through a combination of programs and materials, including the acclaimed Audubon Maga..

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How far from earth is the closest star other than the sun?

Proxima is a red dwarf star that is found in the constellation Centaurus. It is smaller than the sun and has one eighth of its mass. However, Proxima is 40 times more dense than the sun. As of 2015, no planets have been found that orbit this star.\nNormally, Proxima is a dim star that can't be seen with the naked eye. However, it is also a flare star and experiences spikes in brightness now and then.

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What is Perspex used for?

In the medical field, Perspex is used to make medical cabinets and baby incubators. The transportation industry uses Perspex acrylic for motorcycle windshields and glazing of helicopters, gliders and boats. It is also used in the design of chairs, tables, shelving, picture frames, lampshades and artwork. In the retail industry, Perspex is useful for creating unique business signs and displays.

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What are different kinds of batteries?

The difference between these battery types is the chemical composition. Different anodes, cathodes and electrolytes give each battery type a different performance profile. This affects their electrical output, useful life and ability to recharge.\nZinc-carbon and alkaline batteries both use zinc for the anode and magnesium dioxide for the cathode. The difference between the two is the electrolyte: alkaline batteries use potassium hydroxide for their electrolyte and zinc-carbon batteries use ammonium chloride. Alkaline batteries derive their name from their electrolyte, which is highly alkaline..

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What are unattached ribosomes in the cytosol?

Seattlepi explains there is a second type of ribosomes, which are called attached ribosomes. They are found on the outside of the endoplasmic reticulum and create a rough surface. They are also responsible for generating proteins, and as the National Center for Biotechnology Information explains, only the proteins generated by attached ribosomes can move outside of the cell.

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What is a blue corn moon?

The term "blue corn moon," which was used in the song "Colors of the Wind" from the movie "Pocahontas," is not one of the actual names for full moons in Native American culture. However, the Full Corn Moon traditionally occurs in September. The names for each month provide a way to track the seasons. The Full Corn Moon is when corn is harvested. Another name for it is the Barley Moon because it is the time of year when the barley was harvested and ripened. Pumpkins, squash, and wild rice were also commonly harvested during this month. This is the full moon that is closest to the date of the au..

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How does acid rain affect soil?

Acid rain doesn't immediately destroy ecosystems, but the stunted growth resulting from acid-rain soil degradation becomes more serious over time. Among the nutrients and minerals dissolved by acid rain are magnesium, potassium and calcium. Plants must absorb these substances to grow. Nutrient deprivation and toxic exposure leaves plants susceptible to the elements, such as rainstorms and cold weather.\nAcid rain may take the form of mist, snow or a dry dust. The corrosive effect of acid rain on soil is seen famously on the bald peaks of the Appalachian Mountains. The soil of these peaks ..

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How do you convert surveying tenths to inches?

Another convenient rule to remember is that 1 inch is equal to 0.0833 tenths of a foot. This allows an equally swift conversion from imperial measurements to decimal feet when needed. If working with hundredths of a foot is cumbersome, a shortcut involves converting 10 inches to 0.833 tenths, and then dividing the result by 10. Finally, many rulers and tape measures are hatched with tenths, which adds an element of precision to the measurement.

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Where can you find information on atoms?

The periodic table lists the atomic number, element symbol, the average weight of the atom and its atomic mass. Periodic tables are available from many sources including the Annenberg Learner, Chem4Kids, HowStuffWorks and WebElements.\nAdditional information on the structure of an atom is available in educational resources from New York University (NYU). The NYU resources include information about the differences between protons, neutrons and electrons; the different parts that make up atoms. The resources also include other forms of valuable information, such as the definition of an isotope, ..

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