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What are the seven different classification groups in order?

These kingdoms are further subdivided into the smaller grouping already mentioned. Within a given kingdom, there can be many different groups of organisms classified according to their perspective phyla. An example is the kingdom Animalia with different phyla, which include Mollusca, Porifera, Chordata, Arthropoda and Annelida.The phylum Chordata includes animals such as fish, reptiles, birds, amphibians and mammals. Mammals belong in the subphylum Vertebrata and class Mammalia. It is a very diverse group that includes primates, dogs, men, bears, squirrels, deer and many other animals.

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How did zinc get its name?

Zinc is a necessary trace element in the human body, has many commercial applications and is one of the most widely used metals, according to data from the Encyclopedia Britannica. Zinc metal is primarily used for galvanizing iron and steel against corrosion and for making alloys for die-casting. Zinc is atomic number 30 on the periodic table of elements and is designated by the symbol Zn.

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What is cell biology?

A cell is the smallest organism capable of carrying out the functions that define a living thing. These functions are metabolism, waste excretion, growth and development, response to stimuli, reproduction and trait heredity, and evolution in response to the environment.\nCell biology is based on modern cell theory, which states that all known living things are made of cells, all cells come from pre-existing cells through division, all cells are basically the same in chemical composition and all energy flow of life occurs within cells.

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When velocity is positive and acceleration is zero, what happens to an object's motion?

A positive velocity means that the object in question is moving in the direction that was chosen as the positive direction. Negative velocity means that the object is moving in the opposite direction. However, the sign of the acceleration, positive or negative, does not refer to the direction that the object is moving. Instead, positive acceleration means the velocity is increasing, and negative acceleration means that the object's velocity is decreasing. Thus, in the third case, when acceleration is zero, the object's velocity remains the same.

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How can we protect the ozone layer from being destroyed?

When ozone depleting chemicals are released into the atmosphere, they eventually work their way into the upper layers. There, ultraviolet radiation breaks down their chemical bonds, converting the complex molecules into their component atoms. Chlorine and bromine are the most dangerous elements to the ozone layer, because they can break apart the bonds between the oxygen molecules in ozone.\nMost countries banned the use of CFCs and other ozone-depleting chemicals by 1996. Unfortunately, the lifespan of these substances in the atmosphere can be measured in decades, and a single atom of chlorin..

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Why are alloys useful?

Dr. Hillert further explains that an alloy’s properties are largely influenced by the method of the formation and treatment of the alloy. Typically, an alloy is more chemically stable than the elements it contains. Alloys are designed to have particular resistance to stresses, such as wear, corrosion, temperature and fatigue. Some are created to impart electrical or magnetic properties, formability and strength. Stainless steel alloys result from the combination of nickel, iron and chromium with other elements. They are specifically resistant to corrosion, unlike ordinary steel. Other exampl..

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How do you measure the specific gravity of metal with water displacement?

The calculation for specific gravity is a ratio of density because a metal's weight, defined as its mass, is affected by the surrounding elements and can vary when the object is suspended in air as opposed to submersed in water. The density of both the water and the metal can be calculated by measuring both their mass and their volume and then dividing the mass by the volume. A special scale may be needed to weigh the mass of the object in the water.\nThe equation changes depending on whether the metal being measured is more or less dense than water. If pure water is being used, the densi..

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What fuel is used in respiration?

Respiration is the process in which cells gain the energy they need to fuel cell activities. The process is considered an exothermic one, which means the entire process can be broken down into a bunch of smaller ones as it occurs in the body. In aerobic respiration, oxygen is needed in order to generate ATP, but carbohydrate, fats and proteins can also be used as reactants during the process.

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What is DNA fingerprinting?

While DNA fingerprinted was initially developed in the early 1980s, the first time the technique was used to catch a criminal was in 1987. Starting in 1989, DNA fingerprinting has since exonerated many people through the Innocence Project. The older method used for DNA fingerprinting was restriction fragment length polymorphism, which required a lot of DNA, but a newer method called microsatellite analysis allowed scientists to analysis DNA with a limited amount of genetic material.\nDeoxyribonucleic acid, or DNA, is a long molecule in the form of a double helix that exists in the cells of lif..

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What is the molar mass of Fe2O3?

In Fe2O3, the Fe stands for iron and the O stands for oxygen. A single atom of iron has an atomic weight of 55.84 grams per mole, while a single atom of oxygen has an atomic weight of 15.99 grams per mole. The total weight of the two iron atoms in the formula is 111.68 grams per mole, and the total weight of the three atoms of oxygen is 47.97 grams per mole.

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