New PDF release: Biology: Science for Life

By Colleen Belk, Virginia Borden Maier

ISBN-10: 0131489690

ISBN-13: 9780131489691

The 3rd variation of Biology: technological know-how for all times keeps to attract scholars into biology via enticing tales that make tricky issues extra available and comprehensible. Colleen Belk and Virginia Borden try to make educating and studying biology a greater adventure from each side of the table. The authors draw from their educating stories to create a textual content with a flowing narrative and cutting edge positive factors that require scholars to develop into extra lively individuals of their studying. each one bankruptcy provides the fabric via a narrative that pulls from actual lifestyles examples, making the analyzing extra enticing and available to trendy scholars. those tales attempt to demystify issues present in biology. The 3rd version of this booklet contains a thoroughly re-designed artwork application and makes use of the authors' instructing stories to create student-centered good points corresponding to the recent Savvy Reader, Visualize This, and forestall and Stretch to inspire and inspire scholar studying. the hot a more in-depth glance permits teachers the chance to extend on convinced vital organic issues. For teachers who wish to hide Animal constitution and serve as and Plant Biology, an alternative version of this e-book, Biology: technology for all times with body structure, is usually to be had.

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Example text

Of the over 200 types of viruses that are known to cause varieties of the common cold, most infect the cells in our noses and throats. 3). Because there are literally millions of varieties of cold viruses, many of which will be attacked by the immune system, we are susceptible to "catching cold" throughout our lives; we are not as susceptible to coming down with chicken pox, which is caused by a single virus, more than once. The enormous capacity for viruses to change over time is discussed in Chapter 10.

This brand of science may eventually give us an answer to a question about how to prevent and treat colds. But we cannot know if it is the best answer unless we try out all the potential treatments. We also will not know if any treatment that seemed to be effective was simply one that we tried at the right time—when our cold was getting better anyway. Luckily for us, legions of professional scientists spend their time trying to answer questions such as these. Scientists use the same basic process of testing ideas about how the world works and discarding (or modifying) ideas that are inadequate.

If we give zinc lozenges to one volunteer and placebo lozenges to another, it is likely that the two volunteers will have colds of different lengths. But even if the zinc-taker had a shorter cold than the placebo-taker, you would probably say that the test did not tell us much about our hypothesis—the zinctaker might just have had a less severe cold for other reasons. Now imagine that we had 5 volunteers in each group and saw a difference, or that the difference was only 1 day instead of 3 days.

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Biology: Science for Life by Colleen Belk, Virginia Borden Maier

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