BIOL 215 Study Guide - Quiz Guide: Nemertea, Priapulida, Scientific Method

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18 Feb 2015
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Based on sperling ea, frieder ca, raman av, girguis pr, levin la, knoll ah (2013) oxygen, ecology, and the cambrian radiation of animals. Questions (*please keep your answers concise and to the point*): 1. the scientific method (discussed in lecture 1) involves observing some element or process in the natural world and formulating a question about why it exists. A researcher can then use this question to generate a testable hypothesis. In this study on polychaete worm communities in low oxygen regions of the ocean, please identify: the observation and subsequent question (1 mark) Question: what ecological and/or environmental factors motivated this speedy radiation of animal body plans: the hypothesis the authors are testing in their study (1 mark) 2. what is the difference between external and internal controls that the authors propose could account for the cambrian explosion? (0. 5 mark) please give an example of each (0. 5 mark).

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