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What happens if you have an extra chromosome?

There are different possible trisomies, some more common than others. For example, trisomy 18 is associated with Edwards syndrome, which causes many physical defects like organ malfunctions and webbed appendages. Another common trisomy is trisomy 21, commonly referred to as Down syndrome. Down syndrome is characterized by a flattened face, slanting eyes and unusually short arms and legs.

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What muscle flexes the forearm and supinates the hand?

Several muscles are able to flex the forearm, either as their primary function or as an effect of their work on the upper arm. These flexor muscles are the biceps brachii, the brachialis, the brachoradialis and the pronator teres. The hand is supinated only by the supinator muscle, which is attached to the wrist and elbow.

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What is the circumference of the earth?

Due to the rotation of Earth, a slight bulge is present at the equator, known as the equatorial bulge. Earth is not, therefore, completely spherical but rather ellipsoid or geoid, meaning Earth-like, in shape. The diameter of the Earth varies as well. Measured at the equator, the diameter is about 7,926 miles. At the poles, the diameter is about 7,900 miles.

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How long does it take to digest water?

Some factors affect how long it takes for water to be digested. If a person drinks water on an empty stomach, it can be present in the bloodstream within five minutes of ingestion. However, if a person drinks water with a meal, digestion may take as long as 45 minutes, as the body needs to process the food first.

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What is the structure of NaCl?

Each sodium ion is joined to six chloride ions to form a crystal, which is referred to as a giant lattice or a giant ionic structure. Electrovalent bonds are formed between the sodium and chloride ions through the transfer of electrons from the sodium atom to the chlorine atom. These bonds are also called ionic bonds, as they form between ions.

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Where do arthropods live?

Scientists believe that even a million species are just the tip of the iceberg, and there are millions more species of arthropods not yet discovered.\nArthropods such as spiders, ticks, centipedes and millipedes are terrestrial, which means they mostly live on land. Crustaceans such as shrimp, crabs, lobster and krill live mostly in the water. However, there are exceptions. The roly-poly bug is considered a crustacean and lives on land. The horseshoe crab isn't a crustacean, but lives in the ocean. It's also one of the oldest animals alive.\nInsects are largely terrestrial as well, a..

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How do you know a thunderstorm is coming?

Certain types of cloud formations are also warnings of a pending storm. Cumulus clouds are giant pillows of heaped up clouds that are a common sign of severe thunderstorms with lightning. These clouds grow fast due to an increase in temperature and progress into large cumulonimbus clouds, which bring on a thunderstorm.\nCirrus clouds are wispy high clouds that form at 20,000 feet or higher and portend changes in weather patterns that can be an indication of incoming bad weather. Lenticular clouds are smooth, long and wavelike. They are an indication of approaching winds high up in the atmosphe..

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What are some tornado facts for children?

A tornado is a violent rotating column of air that is in contact with the earth's surface and a cumulonimbus cloud or, in some instances, the base of a cumulus cloud. Extreme tornadoes that reach up to 300 miles per hour can be two miles wide and stay on the ground for more than 100 miles. A waterspouts is described as a funnel-shaped wind current connected to a cumulonimbus or cumulus cloud, and they typically develop in tropical areas near the equator. Some people have storm shelters at their homes to stay underground when there is a tornado.\nIn 1925, Annapolis, Missouri was hit by one..

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How do you convert temperatures from Celsius to Fahrenheit?

Get the Celsius numberTo convert Celsius to Fahrenheit, a number that measures degrees of Celsius is needed. This number is usually designated by the letter C.Convert Celsius to FahrenheitMultiply by nine, divide by five and then add 32. For example, to convert 20 degrees Celsius, first multiply 20 by nine to equal 180. Then divide 180 by five to equal 36. Then add 36 plus 32 to equal 68 degrees Fahrenheit.Convert Fahrenheit to CelsiusSubtract 32, multiply by five and then divide by nine. For example, to convert 77 degrees Fahrenheit, first subtract 32 from 77 to equal 45. Then multiply 45 by ..

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What are some facts about rocks and minerals?

Igneous rocks are formed by volcanic action, such as molten lava that solidifies, or granite that is created by magma that solidifies underground. The most common igneous rock is basalt, which covers the sea floor. It is a dark lava rock, just like the rocks formed on the Big Island of Hawaii when Kilauea's lava cools. Granite is much older, sometimes taking four billion years to break the surface.\nSedimentary rocks form when bits of other rocks, as well as plant and animal remains, accumulate in low-lying areas and are compressed. These are most commonly found near lakes and oceans. Lim..

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