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Examining Some Genetic Diseases

Genetic diseases are the result of an abnormal pattern in the DNA of an individual. These diseases are inherited, though some individuals are only carriers and not sufferers. Recently, quite a bit of research [more…]

Biology -- Visiting the Fungi Kingdom

Fungi once were considered to be plants because they grow out of the soil and have rigid cell walls. Nowadays they are placed independently in their own kingdom of equal rank with the animals and plants [more…]

Evolutionary Ideas: Species and Speciation

In evolution, speciation is simply the process whereby a single lineage (species) splits into two lineages. In other words, new species arise from existing species. But what constitutes a species, and [more…]

Finding Extrasolar Planets

Astronomers have believed for decades that planets are plentiful, simply because the birth of a star is inevitably accompanied by leftover material — a messy residue of gas and dust that can turn into [more…]

Evolutionary Differences: Macroevolution versus Microevolution

An ongoing debate in evolution is whether there is a distinction between macroevolution and microevolution, and if so, how to define that difference. Since the advent of molecular biology, with its insight [more…]

Taking a Shine to Nebulae

A nebula is a cloud of gas and dust in space ("dust" meaning microscopic solid particles, which may be made of silicate rock, carbon, ice, or various combinations of those substances; [more…]

Smaller Than Species: Subspecies, Races, and Breeds

Species isn't the final word on differences between living things. Variation exists among different populations of the same species. Subspecies, race, and [more…]

Physics -- Sounds Too Cool To Be True?

Sound waves are produced by a vibrating body. The vibrating object moves in one direction and compresses the air directly in front of it. As the vibrating object moves in the opposite direction, the pressure [more…]

Understanding Ozone Depletion

The ozone layer absorbs almost 99 percent of the ultraviolet radiation that reaches the earth from the sun. It protects us from the effects of too much ultraviolet radiation, including sunburns, skin cancers [more…]

Why You Want Nanotechnology in Your Life

Nanotechnology will increase your standard of living — no ifs, ands, or buts. Done right, it will make our lives more secure, improve healthcare delivery, and optimize our use of limited resources. Pretty [more…]

Making Interstellar Travel Possible

For those of us who keep our eyes fixed to the heavens, Einstein's theory of special relativity has thrilling implications. Namely, the relativity of time and space allows for the possibility of human [more…]

Astronomy -- Time to Practice Saving the World

Ever wonder what would happen if the Earth were ever really threatened by an incoming asteroid just like in the movies? Well, some in the European Space Agency have been thinking about it, too. [more…]

Physics -- Reflecting on Reflections

Diffuse reflection occurs when light reflects from a rough surface. The reflected rays are scattered in diffuse reflection. This scattering occurs because the local direction of the normal to the surface [more…]

Getting the Big Picture: Forensics in Action

You witness a burglar sneaking away from a store late at night. You call the police, and when they arrive, you identify the thief as someone you know. That person is arrested. However, fingerprints from [more…]

Eyeballing Evolution and Vision

Eyes are beautifully complex structures, and their evolution was a source of some mystery to Charles Darwin. The idea that the eye could not have arisen from the process of natural selection is a common [more…]

Plant Biology -- Ripening Seeds

Almost all seeds undergo some period of dormancy — if they did not, they would start to grow in the fruits on the mother plant and defeat their principal purposes: dispersal and survival of the germplasm [more…]

A Down Side of Evolutionary Change: Antibiotic Resistance

In the days before antibiotics were widely available and widely used, people knew the dangers of infection. Even minor injuries like cuts and scrapes were taken far more seriously. Like they say, an ounce [more…]

Greek Tidbits in Medical Terms

Most common medical terms used today are derived from Latin or Greek. After all, the Greeks were the founders of modern medicine. Examples of medical terminology used today based on the Greek language [more…]

Medical Terms Commonly Misspelled

Don’t get discouraged studying medical terminology. A large group of medical terms are notorious for being difficult to spell. These medical terms are commonly misspelled: [more…]

Your Body’s Systems

Your body is made up of many systems, each having their own vital parts that work together. This list represents your bodily systems and the specific parts that comprise them: [more…]

Common Medical Root Words

The root of a word is its main part and core meaning. These common medical root words give you a general idea of what you’re dealing with or specify a body part. [more…]

TI-83 Plus Graphing Calculator: Math Functions and Constants

You have a TI-83 Plus graphing calculator because you need to do math functions. The TI-83 Plus calculator helps you out by coming with pre-set buttons for constants, such as ð [more…]

Set Up a Graph with the TI-83 Plus Calculator

The purpose of having a TI-83 Plus graphing calculator is to help you graph, right? Peruse the basics of how to get the TI-83 Plus calculator into graphing mode, how to format the graph, and so on: [more…]

Zoom Functions on the TI-83 Plus Graphing Calculator

Z is for zoom, on a TI-83 Plus graphing calculator. In addition to helping you design a graph, your TI-83 Plus calculator can zoom into a section and redraw a graph to meet different criteria. Discover [more…]

Special Menus on the TI-83 Plus Graphing Calculator

The TI-83 Plus graphing calculator has all sorts of menus, from drawing to financial to probability. Explore these special menus on your TI-83 Plus calculator by checking out this list: [more…]


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