The ideas of Lamarck - ANSWER In 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...
BIO 182 Exam 1 Study
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The ideas of Lamarck - ANSWER In 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) - ANSWER requires 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 - ANSWER The 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) - ANSWER Consists of steps that combine reasoning and observations.
SM Controls - ANSWER A 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 - ANSWER An 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
Understand the basically random origin of mutations: - ANSWER Natural selection is assumed to act on
pre-existing mutations in a population. Organisms aren't supposed to be able to mutate in response to
difficulty - instead they survive or die based upon the traits that they already possess
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