BIO 187 Final Review

BIO 187 Final Review - BIO 187 Final: May 6th, 12:15 2:00pm...

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BIO 187 Final: May 6 th , 12:15 – 2:00pm How Scientists Do Science: The Goal of Science : Checking the validity of hypotheses. Question: A point of curiosity that a scientist desires to explore further. Causal Question- A question regarding what causes something to happen a certain way . Ex: “Why does Barbourula kalimantanensis (a species of frog) not croak like other frogs?” Descriptive Question- A question about the factual nature of something. Ex: “ How many different individual Caladenia huegelii (a species of orchid) does the average pollinator visit in a lifetime?” Hypothesis: A tentative answer to the question being asked. Ex: “Now, it might be that the Venus Flytrap is carnivorous in order to gather essential nutrients that it doesn’t get otherwise. It is also possible that the Venus Flytrap is carnivorous in order to keep the numbers of small insects at sustainable numbers.” Note: It is acceptable and common to have multiple hypotheses to test for the same question. Prediction: An educated guess about the outcome of an experiment. Ex: “If the reason plant growth is lacking in bodies of water due to low quantities of essential nutrients then if phosphorous is added Test Evidence: The factual statement of the outcome of an experiment. Note: Contains no interpretation. Ex: “ The genotype (A2,B2) was found to be most common among Australian females.” Scientific Conclusion: A statement of support or rejection in regards to the hypothesis/hypotheses following testing. Ex: “Biomes are, at least in part, the result of variations in rainfall.” Tips & Tricks: Watch for key words like “perhaps” in hypotheses, “should” in predictions Key words do NOT work every time. Causal/Descriptive questions inquire about situations, Hypotheses offer tentative answers Just because it ends in a “?” does not mean can’t be a hypothesis or prediction. Test Evidence offers NO INTERPRETATION , only a statement of the results A valid scientific conclusion will utilize the test evidence to support/reject hypothesis Hypotheses are tentative, Conclusions either support/reject those hypotheses Hypotheses offer explanations, predictions “guess” at outcomes of experiments
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Descriptive vs. Causal – Try actually saying “what causes” in the question Evolutionary Biology: Darwin- Most famous biologist and author of the two most famous evolutionary theories- Tree of Life and Natural Selection. Those who support these two modernized theories are “Darwinists.” Tree of Life Theory- Theory explaining why organisms share similar attributes. Descent with Modification-
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This note was uploaded on 09/22/2009 for the course BIO 10067 taught by Professor Plowes during the Spring '09 term at ASU.

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BIO 187 Final Review - BIO 187 Final: May 6th, 12:15 2:00pm...

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