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Unformatted text preview: Bio 20 Review Exam #1 1. Recognize the role of the control in an experiment: (Standard for comparison) a. Control: (Standard for comparison) A variable that remains unchanged or held constant to prevent its effects on the outcome b. Dependent: (Use it on the experimental group) The variable whose value is measured to determine the extent of the effect of another variable to it. Depends on independent c. Independent: The variable that is manipulated in an experiment. Variable you can change 2. Identify the component of the scientific method. (Observation, hypothesis, etc.) a. If and then. b. A Hypothesis is a proposed explanation for a set of observations. It is a prediction and a supposition. b.i. Deductive Reasoning: Logic used in hypothesis-based science to come up with ways to test hypotheses. In Deduction, the reasoning flows from the General to the Specific. b.ii. Inductive Reasoning: Goes from specific to general. Inductive is the more common process used in science. c. A Hypothesis that is supported by much evidence becomes a theory c.i. Theories can never be completely proven. c.ii. Theory: Explains a great diversity of observations and is supported by a large and usually growing body of evidence, and theories continue to generate new hypotheses, which can be tested. Hypothesis supported by much evidence become theories 1. Scientists use two approaches to learn about nature: The Discovery Science and Hypothesis- Based Science. a. Discovery Science: (Inductive Reasoning) Begins with Observations and works up. b. Hypothesis-Based Science: (Deductive Reasoning) Begins with a Theory and works down. 3. What are the main 4 players in life forms? a. Oxygen b. Carbon c. Hydrogen d. Nitrogen 4. Recognize the 8 or more characteristics of living things. a. Organization: All living things exhibit complex organization, as seen in the highly ordered structure of a sunflower. b. Metabolism (Energy Utilization/processing): Organisims take in energy and transform it to perform all of lifes activities. c. Homeostasis (Regulation) - The ability or tendency of an organism or cell to maintain internal equilibrium by adjusting its physiological processes d. Growth, Development, and Reproduction e. DNA and Heredity (Genetic Traits) f. Chemical Composition (Molecules) g. Connected with other life forms Web of Life h. Variation in population 5. Identify the scientists responsible for the theory of evolution....
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- Fall '10