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Chapter 1 - Chapter 1 What is Biology? What do Biologists...

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Chapter 1 What is Biology? What do Biologists Study? How do Biologists ask questions? What are the major themes of Biology? What do we know now?
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Biology is the Science of life If you didn’t know this before today, we are going to have a long semester As with every form of inquiry, we have new questions What is science? What is life?
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Some Properties of Life What makes something living and something else nonliving? Living things show order, evolve, respond to environment, regulate (temp, ions, nutrients, ….) process energy, grow and develop, and reproduce. In order for something to be living, it must show ALL these characteristics
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Examples of some of the properties of life
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Life shows order
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Life shows evolutionary adaptation
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Life processes energy
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Life shows patterns of growth and development
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Biology is a diverse science Very recent compared to the other natural sciences Chemistry, physics, astronomy, geology The most dramatic advances have been within the last 150-200 years Cell theory, Evolutionary theory, Genetics, Ecology These branches really solidified in the 20 th century
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What are kinds of questions that biologists ask? What is the function of hemoglobin? What do desert mantids eat? How do rattlesnakes move? How much CO 2 do temperate forests recycle in a year? How does sediment from Colorado River affect intertidal regions in the Sea of Cortez?
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All of these questions are suitable for a biologist These illustrate the different levels of hierarchy that exist • How much do CO 2 do all the plants in the world recycle? This is an example of asking questions at the largest, most encompassing level of hierarchy-The Biosphere level By focusing on temperate forests of North America, we slice it down to the Ecosystem level, the next level down
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Biological hierarchies The next level is the Community level This level includes all of the living things in an ecosystem How do these living things interact? How does a chameleon use a tree to feed? What kinds of insects do chameleons eat?
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Biological hierarchies The next level down is the population level This level includes all the members of one species How do chameleons mate? What kinds of interactions are possible when two males meet? Do chameleons care for young?
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Biological hierarchies Down to Organismal level Here we are focusing on an individual of a population How do chameleons obtain food? What is involved in their feeding behaviors?
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Chapter 1 - Chapter 1 What is Biology? What do Biologists...

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