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Receiving the wrong blood type can lead to a severe reaction that is potentially life threatening, according to WebMD. Symptoms such as fever, hives, shortness of breath, chills, low blood pressure and pain are all reactions that can range from mild to severe that are linked to blood transfusions. This is a rare occurrence caused by human error that happens in just one out of every 14,000 transfusions performed.

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    • What are disadvantages of asexual reproduction?

      Q: What are disadvantages of asexual reproduction?

      A: The primary disadvantage to asexual reproduction is the lack of genetic diversity among the resulting offspring. In contrast to sexual reproduction, which involves the recombination of two different sets of genes, an asexual organism possesses the same genes as its parent did. This can lead to problems if the parent has a genetic defect; without another parent to replace the gene, the offspring possesses the defect as well.
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    • What is the difference between paternal and maternal twins?

      Q: What is the difference between paternal and maternal twins?

      A: Paternal and maternal twins, commonly known as fraternal and identical twins, are distinguished by the different ways the multiple pregnancy begins. Identical twins begin as a single zygote that splits into two or more developing embryos. Fraternal twins are usually the result of multiple eggs being present for fertilization.
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    • What is biological spectrum?

      Q: What is biological spectrum?

      A: The biological spectrum consists of all living organisms divided into three domains, coexisting across various levels of biological organization. Microbiologist Carl Woese organized all known organisms into a phylogenetic tree of life based on RNA and common ancestor comparisons. The three domains are bacteria, archaea and eukaryota, which are further subdivided into kingdoms. All three domains exist on various levels of biological organization, from a cellular level to its biosphere.
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    • In what part of the body does mitosis occur?

      Q: In what part of the body does mitosis occur?

      A: Mitosis occurs in every single cell that makes up the entire body. It occurs in the tissues and organs to help replace cells that have been lost as a result of normal wear and tear on the body.
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    • How many pounds of pressure is needed to break a bone?

      Q: How many pounds of pressure is needed to break a bone?

      A: For smaller bones, a pressure of 25 pounds may be enough to break them. The amount of pressure that it would take to break a bone depends on the bone. Some bones are stronger than others.
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    • Why were blood tests required before marriage?

      Q: Why were blood tests required before marriage?

      A: Premarital blood tests have been used to check people getting married for syphilis, rubella, HIV and sickle-cell anemia. The objective of such tests was to ensure the infected person got treated prior to infecting his or her partner or child. In the United States, premarital blood laws were enacted during the 1930s and 1940s when syphilis was considered a potential public health concern.
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    • What is geochemistry?

      Q: What is geochemistry?

      A: Frank Wigglesworth Clarke, who has been labelled as the "Father of Geochemistry," defines geochemistry as all geographical study that involves chemical change. Victor Goldschmidt, known as a pioneer of modern geochemistry, defines geochemistry as the study of the amount and the distribution of the chemical elements in the atmosphere, rocks, soils, minerals and water.
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    • What is the most flammable substance in the world?

      Q: What is the most flammable substance in the world?

      A: The most flammable substance in the world is chlorine trifluoride, according to About.com. This substance is so flammable that it does not require an ignition source to combust.
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    • Which elements are used for making coins?

      Q: Which elements are used for making coins?

      A: Copper, zinc, nickel, gold, manganese and silver are the elements used for making coins. Common U.S. coins, such as the penny and dime, are made mostly of copper.
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    • What is the normal phase of gold?

      Q: What is the normal phase of gold?

      A: At normal room temperature, about 70 degrees Fahrenheit, gold exists in a solid phase. It is classified as a metal and must be heated to extreme temperatures to transform into a gas or liquid. It is a soft metal and is extremely malleable and ductile. Because it is so malleable, it is often added to other metals like silver or platinum to create an alloy that is more durable.
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    • What is the most reactive metal in the periodic table?

      Q: What is the most reactive metal in the periodic table?

      A: The most reactive metal in the periodic table is francium. Francium belongs to the alkali metals, a group on the periodic table whose members are all highly reactive. These metals are highly reactive because they all have only one valence electron.
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    • How do matches work?

      Q: How do matches work?

      A: Match heads contain phosphorus, potassium chlorate and sulfur, and when heated by friction, the phosphorus ignites, causing the other two materials to burn. When ignited, the potassium chlorate produces oxygen in amounts far exceeding what is typically found in the surrounding air. The oxygen and sulfur mixture burns steadily, igniting the matchstick to produce a usable flame.
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