BIO 182 Exam 1 Study Guide Questions and Answers with Complete Solutions

BIO 182 Exam 1 Study Guide Questions and Answers with Complete Solutions The ideas of Lamarck - answerIn the 19th Century Lamark proposed a mechanism referred to as the inheritance of acquired characteristics, which states that changes that affect an organism during its lifetime would be passed to its offspring (ie. stress of environment or bvhr Evolution by Natural selection (understanding the mechanism) - answerrequires that organisms possess heritable differences and that certain organisms reproduce more than others. Applying the idea of natural selection to understand how populations of bacteria become immune to antibiotics - answerThe antibiotic action is an environmental pressure; those bacteria which have a mutation allowing them to survive will live on to reproduce. They will then pass this trait to their offspring, which will be a fully resistant generation. The Scientific method (definit'n) - answerConsists of steps that combine reasoning and observations. SM Controls - answerA group in a study that recieved no treatment of a placebo to compare the outcome of control to the hypothesis. SM dependent vs independent variables - answerAn independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment SM replicates - answerA count the of individual samples or observations in any statistical setting, such as a scientific experiment or a public opinion survey. Sample size is a critical determination for a project. Too small a sample yields unreliable results, while an overly large sample demands a good deal of time and resour