Science

Refine Search

How many chromosomes does a horse have?

Mapped in 2007 by the Horse Genome Project, the genetic material of a horse includes 2.7 billion DNA base pairs inside each chromosome. Other animals with 64 chromosomes are the chinchilla, the fennec fox and the spotted skunk. Donkeys, which have 62 chromosomes, are bred with the domesticated horse to produce mules, which have 63 chromosomes. Because of this odd number, most mules are infertile.

Continue Reading

What are some effective ways to study kinematics?

An online course is mainly useful for someone who has not studied kinematics before. If you are just looking for a refresher, SparkNotes.com contains an overview of kinematics including important vocabulary and formulae. Many similar sites offer sample quizzes to test your knowledge as well.\nMore visual learners can find shared slides used by physics professors to study from, or search for educational videos on a site such as Youtube.com. ElucideanSpace.com contains a short lesson with several illustrations and diagrams to reinforce understanding. These sites can help students who have troubl..

Continue Reading

Why did Mendeleev leave gaps in his periodic table?

Mendeleev put together the periodic table on the basis of known properties about atoms, specifically the atomic mass, equivalent mass and valency. This method revealed repetitive, or periodic, patterns among the elements that suggested an inherent organization. In some cases, the measured atomic mass of an atom conflicted with its predicted position in Mendeleev's periodic table. In these situations, Mendeleev correctly assumed that the measurement was wrong, and he successfully estimated the correct atomic mass.\nSimilarly, Mendeleev predicted the properties of the elements that would fi..

Continue Reading

What is the process of lithification?

Compaction is a process of lithification that works for finer particles only. Compaction occurs when particles such as clay minerals are compressed. Coarser particles are not able to be hardened with this process because compression does not make them stick together.\nMinerals such as limestone and aragonite can harden through the process of recrystallization. These minerals are easily dissolved in water, and the crystals that form from those dissolved minerals are much harder than the original substances.\nCementation is the process where coarser grain sediments become hardened rock. Water fi..

Continue Reading

Which types of white blood cells consume microorganisms?

Phagocytes are large white blood cells that phagocytose, or swallow, microbes and antigens that circulate throughout the bloodstream. Monocytes are a type of phagocyte that can be found in human tissues outside of the bloodstream and also have the ability to consume microbes and foreign antigens. Neutrophils account for nearly 60 percent of all white blood cells, and they can be found in the blood steam and the lymphatic system. They consume bacteria and foreign antigens as well to help combat disease.

Continue Reading

What are the advantages of biomass energy?

Biomass is a sustainable and efficient energy resource. Biomass fuels may come from solids, liquids or gases and derive from biomass feedstock. Biomass feedstock can be recycled or renewable matter such as wood residues, agricultural waste, food processing residues and methane gas from waste sites to produce energy. Biofuel technologies convert waste into heating, transportation and electricity-generating fuels. It is produced from available organic matter.\nBiofuels are a reliable energy source because the organic materials used to produce biomass energy are in constant supply. As of 2014, th..

Continue Reading

What do ninhydrin test results mean?

A simple ninhydrin solution can be made by putting 25 grams of ninhydrin crystals into a gallon of solvent. Acetone, which may be obtained from any paint store, is the easiest to obtain. The ninhydrin degrades the amino acids into ammonia, aldehydes, and CO2 through the series of reactions. This leaves the ninhydrin in a partially reduced form of hydrindantin. The ninhydrin then condenses with the ammonia and hydrindantin, creating the bluish pigment, called Ruhemann's purple.\nEach acid gives a slight variation to the color, and as stated above, hydroxyproline and proline produce a yello..

Continue Reading

What is the number of protons in carbon?

The atomic symbol for carbon is C. The element has an atomic number of 6. The element contains six electrons in the outer shells of the atom. The name "carbon" originates from the Latin word "carbo," which means coal or charcoal.\nCarbon is the fourth most abundant element in the universe. The element is the second most commonly found element in the human body; the most common element in the human body is oxygen.

Continue Reading

What are the seven steps of the scientific method?

Before a scientific experiment can be performed, proper research and preparation must take place. The first step in the scientific method is to make observations on the specific topic of interest. Scientists consider why or how something naturally occurs and develop testable questions for investigation. Once questions have been formed, the next step is to research the existing knowledge of the chosen topic to inform the subsequent steps in experiment design. After research, scientists form a hypothesis or educated prediction for what will occur during the experiment.\nThe next step is to desig..

Continue Reading

What is sodium thiosulfate pentahydrate?

Sodium thiosulfate pentahydrate has a tetrahedral shape and is derived by replacing one of the oxygen atoms with a sulfur atom under certain circumstances. It is used in different industries for different purposes, including in manufacturing and as a means of dechlorinating certain small bodies of water such as ponds or even domestic aquariums.\nSodium thiosulfate pentahydrate is a fixing agent in photography, which means it can dissolve silver salts from negatives, and it is used as part of the photo developing process. When dissolved in a large amount of warm water, it can be used as a clean..

Continue Reading
Showing 2121 to 2130 of 10000 (1000 Pages)