Biology 1400 Exam 1 questions with answers.

Biology 1400 Exam 1 questions with |\ |\ |\ |\ |\ |\




answers


science - CORRECT ANSWERS ✔✔organized, systematic process
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for answering questions; uncovers truth about natural world
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using evidence based on empirical definitions.
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empirical observation - CORRECT ANSWERS ✔✔based on senses
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hypothesis - CORRECT ANSWERS ✔✔common to all sciences |\ |\ |\ |\ |\ |\ |\ |\




-potential answer to a question |\ |\ |\ |\




-explanation on trial with evidence |\ |\ |\ |\




-must be testable and falsifiable
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theories - CORRECT ANSWERS ✔✔heavily and independently
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supported explanations that are the best available scientific
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understanding of the topic |\ |\ |\




aim of the scientific field - CORRECT ANSWERS ✔✔about self-
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correcting on basis of new evidence that contradicts established
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ideas


theory vs. law - CORRECT ANSWERS ✔✔theory answers "why"
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and explains laws
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laws are observations or descriptions that always hold true
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,(theories and laws are complementary of each other)
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2 ways of putting hypothesis on trial - CORRECT ANSWERS ✔✔1.
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experiment
2. observational research
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relation between correlation and causation - CORRECT ANSWERS
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✔✔they do not equal one another |\ |\ |\ |\ |\




what happens during an experiment? - CORRECT ANSWERS
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✔✔researchers manipulate one variable (independent variable) |\ |\ |\ |\ |\ |\


but keep all other variables constant (control group).
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what happens during observational research? - CORRECT
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ANSWERS ✔✔variables can't be kept constant (no control group)
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this study method is good at revealing correlations
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requires additional research to determine cause/effect
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correlation - CORRECT ANSWERS ✔✔relationships/linkages|\ |\ |\ |\ |\


between two variables |\ |\




what is an example of observational research? - CORRECT
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ANSWERS ✔✔Smoking causes lung cancer |\ |\ |\ |\




types of correlations - CORRECT ANSWERS ✔✔positive and
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negative

, Experimental design - CORRECT ANSWERS ✔✔an experiment that |\ |\ |\ |\ |\ |\ |\


includes a placebo; eliminates alternate explanations in studies
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of human therapies
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placebo - CORRECT ANSWERS ✔✔intentionally ineffective
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"treatment" to reduce bias based on expectations of participants
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control group - CORRECT ANSWERS ✔✔not manipulated
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blind study - CORRECT ANSWERS ✔✔participants don't know
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which group they're in |\ |\ |\




double blind - CORRECT ANSWERS ✔✔neither participants nor
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administrator know group assignments |\ |\ |\




What is a common factor between experimental and
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observational research? - CORRECT ANSWERS ✔✔results must be |\ |\ |\ |\ |\ |\ |\


analyzed statistically to determine probability that a
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difference/trend is a repeatable, generally applicable
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phenomenon or just a product of chance |\ |\ |\ |\ |\ |\




statistically significant - CORRECT ANSWERS ✔✔results unlikely to
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be due to chance; fluke
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statistical significance is calculated on the basis of what 3 things?
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- CORRECT ANSWERS ✔✔actual measured difference (slope of
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line)
sample size |\