Biol101 Study Guide Test.

BIOL101 STUDY GUIDE TEST. All living things require and outside source of materials and energy; the sum total of all chemical reactions that occur within a cell to provide these materials and energy is called __________. - CORRECT ANSWER metabolism However, for these processes to continue, living things must maintain ___________ or a constant internal environment. - CORRECT ANSWER homeostasis This includes maintaining a stable __________, moisture, level, and acidity. - CORRECT ANSWER temperature Some organisms depend on _____________ to maintain this constant internal environment. For example, lizards lounge on rocks in sunny locations to warm their bodies and seek shade to cool their bodies. - CORRECT ANSWER behaviors Other organisms rely on __________________ to maintain this constant internal environment. For example, penguins have extra layers of feathers and a layer of blubber to keep warm and dry in cold, snowy conditions. - CORRECT ANSWER physical modifications These are both examples of ___________, or modifications that make organisms suited to their way of life. - CORRECT ANSWER adaptations Levels of classification from least inclusive, to most inclusive... Order, family, genus, species, phylum, class, kingdom, domain - CORRECT ANSWER species, genus, family, order, class, phylum, kingdom, domain Scientific experiments A researcher wants to test his hypothesis that a diet low in fats will lead to a decrease in LDL cholesterol over several months of time. From the following list of statements, select those that will lead to the best experimental design. - CORRECT ANSWER All ((except)) for: Measure the cholesterol level of two randomly chosen men at the onset of one study. Prescribe to all patients a carefully regimented diet that contains a variety of low-fat options, tailored to the caloric needs of each man. Discard from the results the men whose cholesterol readings did not fit the hypothesis. Science and social responsibility The following are examples of a few of the benefits and costs of using technology. For each, decide if it describes a cost or a benefit and classify it accordingly.