By Cecie Starr
May still there be caution labels on speedy meals? may 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 grasp biology whereas encouraging you to contemplate serious matters. The issues-oriented strategy enlivens the subject material and is helping you clutch suggestions via making connections among biology and real-life issues. this is the way it works: An "Impacts, concerns" case examine opens every one bankruptcy, concentrating on a biology-related societal factor. you furthermore may view a brief movie that expands at the factor. Then each one chapter's "How may You Vote?" query, encouraged by way of the case examine, asks you to contemplate biology-related information, discover the evidence in the back of the problem, follow your wisdom of biology, and forged a vote on the internet. it's also possible to see country and national balloting tallies. This e-book has been greatly praised for transparent and interesting writing, artwork with step by step callouts, and fabulous aid from scholar media that each one interact that can assist you "get" biology.
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Additional resources for Biology: Concepts and Applications , Seventh Edition
DNA is the signature molecule of life. No chunk of granite or quartz has it. Why is DNA so important? It is the basis of growth, survival, and reproduction. It is also the source of each organism’s distinct features, or traits. DNA contains instructions. Cells use some of those instructions to make proteins, which are long chains of amino acids. There are only 20 kinds of amino acids, but cells string them together in different sequences to make a tremendous variety of proteins. 6). Different proteins have structural or functional roles.
Organ organ system Structural unit of two or more tissues that interact in one or more tasks. This parrotfish eye is a sensory organ used in vision. Organs that interact in one or more tasks. The skin of this parrotfish is an organ system with tissue layers, organs such as glands, and other parts. atom Atoms are fundamental units of all substances. This is a model for a single hydrogen atom. 3 Animated! Levels of organization in nature. cells organize into tissues, organs, and organ systems, all interacting in tasks that keep the whole body alive.
For example, remember the explorers you read about in the chapter introduction? They could not sample the entire rain forest, which cloaks more than 2 million acres of New Guinea’s Foja Mountains. Doing so would take unrealistic amounts of time and effort. Besides, tromping about even in a small area can damage forest ecosystems. Given such constraints, researchers tend to experiment on subsets of a population, event, or some other aspect of nature that they select to represent the whole. They test the subsets and use the results to make generalizations about the whole population.
Biology: Concepts and Applications , Seventh Edition by Cecie Starr