By Cecie Starr, Christine Evers, Lisa Starr
May still there be caution labels on quickly meals? should still SUV drivers pay additional taxes? should still employers be allowed to require drug trying out of potential staff? This introductory biology textual content is helping you examine the method of technology and uncomplicated organic rules whereas encouraging you to consider severe concerns. New "Take domestic Messages" assist you clutch key recommendations whereas distinctive gains just like the bankruptcy establishing case stories and "How might You Vote?" questions make the fabric come to lifestyles. New "Figure It Out" questions in lots of illustrations assist you comprehend the options communicated within the figures and the hot info research actions on the finish of each bankruptcy develop your analytical abilities. This e-book has been extensively praised for transparent and fascinating writing, paintings with step by step callouts, and extraordinary aid from scholar media that each one interact that will help you "get" biology.
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Should still there be caution labels on quickly meals? should still SUV drivers pay additional taxes? may still employers be allowed to require drug trying out of potential staff? This introductory biology textual content is helping you research the method of technological know-how and uncomplicated organic ideas whereas encouraging you to contemplate severe concerns.
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Extra info for Biology: Concepts and Applications (8th Edition)
For example, animal diseases are often used as models to investigate similar human diseases. Careful observations are one way to test predictions that flow from a hypothesis. So are experiments: tests designed to support or falsify a prediction. A typical experiment explores a cause and effect relationship. Researchers investigate causal relationships by changing or observing variables, which are characteristics or events that can differ among individuals or over time. An independent variable is defined or controlled by the person doing the experiment.
18 Introduction Copyright 2011 Cengage Learning, Inc. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. indd 18 3/3/10 11:27 AM The Secret Life of Earth (revisited) connections that shape our consciousness. This is not to say subjective answers have no value, because no human society can function for long unless its individuals share standards for making judgments, even if they are subjective. Moral, aesthetic, and philosophical standards vary from one society to the next, but all help people decide what is important and good.
For example, Nicolaus Copernicus concluded in 1540 that Earth orbits the sun. Today that idea is generally accepted, but during Copernicus’s time the prevailing belief system had Earth as the immovable center of the universe. In 1610, astronomer Galileo Galilei published evidence for the Copernican model of the solar system, an act that resulted in his imprisonment. He was publicly forced to recant his work, spent the rest of his life under house arrest, and was never allowed to publish again. As Galileo’s story illustrates, exploring a traditional view of the natural world from a scientific perspective might be misinterpreted as a violation of morality, even though the two are not the same.
Biology: Concepts and Applications (8th Edition) by Cecie Starr, Christine Evers, Lisa Starr