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What is the definition of stem cells?

Because stem cells have not differentiated yet, they have the potential to become different types of cells in the body. The most versatile is the embryonic stem cell, which is taken from an embryo about 5 to 7 days old. Embryonic stem cells can become any type of cell in the body. Adult stem cells, also called somatic stem cells, have a limited ability to change into different cells of the body. Another type, the induced pluripotent stem cell, is made in a lab but originates from cells such as skin cells in a person's own body. Scientists then "reprogram" the cell, changing it into an und..

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What is the inclination joint of a microscope?

A light microscope has many components. The eyepiece is located in the body tube. The fine adjustment knob is used to focus the specimen after using the coarse adjustment knob. The nosepiece holds the specimen. The high and low power objective are used for magnification of the specimen. The diaphragm determines the amount of light allowed through the specimen. The arm of the microscope is used to grasp and to carry the microscope.

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How does gravity work?

An analogy often used to help people understand gravity is this: place a large marble on a rubber sheet and observe how the sheet indents; the marble represents the sun and the indentation represents its gravitational pull. Place a smaller marble representing Earth on the sheet and observe how the indentation of the rubber sheet causes the smaller marble to roll toward the larger.\nAs of 2015, though, science's understanding of gravity has not yet been reconciled with its understanding of particle physics. Dividing the two topics is a threshold called the Planck length, which is extraordi..

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What is a linear measurement?

The foot and the meter represent the two standard units of measure. One foot equals 0.305 meter, and 1 meter is 3.28 feet. For much longer distances, 1 mile equals 5,280 feet and 1 kilometer is 1,000 meters. One mile is 1.61 kilometers and 1 kilometer equals 0.62 mile. Twelve inches equal 1 foot, and 1 inch is 2.54 centimeters.\nTwo linear measurements that enclose an area create a square measurement. The simplest square measurement is the area of a square. For example, a square with each side 3 feet long is 9 feet squared in area because the length is multiplied by the width for two dimension..

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Why do chemists use methyl orange in a titration?

Titration is a technique in chemistry that is used to find a concentration of an unknown solution. Different pH indicators are used in titration that change color at a certain pH, allowing the chemist to know when a reaction has been completed. Among these indicators are universal indicators, phenolphthalein and methyl orange.Methyl orange, which is also used as a textile dye, is used as an indicator in titration because of its bright and distinct color change. At a pH value of 3.1, methyl orange appears red. When the pH rises to 4.4, methyl orange changes to a bright orange color. While pheno..

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What is morganite?

Morganite can be seen as a close cousin to both emeralds and aquamarines because all three are forms of beryl. Emeralds are green due to chromium and vanadium atoms, while aquamarines are blue mostly due to iron. Samples of morganite of notable size and quality were first discovered in Madagascar in 1910. Following this discovery, the gemologist G. F. Kunz recommended that the gemstone be named after financier J. P. Morgan. In December 1910, the New York Academy of Sciences officially named the mineral, previously known simply as pink beryl, morganite.\nOne of the largest known specimens of mo..

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What is the smallest part of an atom?

Fermions are the building blocks of matter and energy in the universe, and are thought to be the smallest particles that exist. Fermions make up most of what is observed in the universe.\nFermions are divided into two classes: quarks and leptons. There are six types of quarks: up, down, charm, strange, top and bottom. Protons and neutrons are made up of three quarks each. A proton has two up quarks and one down quark, while a neutron has two down quarks and one up quark. Quarks have a fractional electrical charge, but when they combine into hadrons such as protons and neutrons they do so in a ..

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Why do breasts have dark hair?

Testosterone is the androgen responsible for patterns of hair growth and loss on the human body. Parts of the body, such as the eyelashes and eyebrows, are less sensitive but are still impacted by testosterone levels. The pubic area, face, underarms and chest are more sensitive to testosterone levels and develop hair following the surge of sex hormone production at puberty.\nDark hairs found on the scalp or pubic area are called "terminal hairs." The lighter, finer hairs that cover most of the body are named "vellus hairs," and are converted to terminal hairs by the action of testosterone.

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How do humans affect the Tundra biome?

Humans continuously pollute Earth, which leads to global warming all over the world. As global warming increases, the planet gets warmer, resulting in melting permafrost and the destruction of the Tundra's natural resources. As the permafrost melts, the decaying materials within let off even more CO2 in the atmosphere, contributing further to global warming.As companies continue to push the idea of drilling for oil in the Tundra, it puts the natural resources in the area at risk.

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Is sugar a compound?

The two monosaccharides found in sucrose are one molecule each of glucose and fructose, which are simple sugars. Sucrose's molecular weight is 342.296 grams per mole. The manufacture of sucrose involves processing sugar canes or sugar beets.Some other disaccharides are maltose and lactose. Lactose is called milk sugar, while maltose is called beer sugar. Although maltose and lactose have the same chemical formula as sucrose, their bonding involves different monosaccharides. Maltose consists of two molecules of glucose, and lactose is made up of one molecule each of galactose and glucose.

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