This material may be copied only for noncommercial classroom teaching purposes, and only if this source is clearly cited. A cladogram can then be drawn illustrating how these groups are related in an evolutionary way. The groups-within-groups hierarchical pattern of Linnaean classification is a result of both netscape Communicator 4.5 PDF and branching from common descent.
The outline-hierarchy reflects a basic boxes-within-boxes structure for the classification of organisms. Classification of organisms is based on evolutionary relationships. How primates are categorized, and how they are related. Find at least a few somewhat smaller baxes that will all just fit into the Kingdom box. The lesson can be used as part of a unit on classification especially in a human-oriented biology course. In this context, this lesson helps to illustrate the nature of a hierarchy, as used in classification. To see the key, send request with your school email address to the WEBMASTER.
Google Images or pictures in books. This is an excellent way to show students how classification relates to evolution and evolutionary « trees ». Likewise, the concept of « common ancestors » occupying the points of divergence can be easily explained. You might also find it interesting to your students to point out a few of the shared characteristics of some of the groups. Bolts Classification – Arbitrary or Not? This latter lesson is especially important because it exposes a very common and widely taught myth about classification.
It is highly recommended to include in any unit on classification. You might want to develop a series of questions to see if your students truly understand what the diagram tells us. This could be done as part of the worksheet, or as a quiz for assessment. Which three groups are most closely related, or biologically most alike?
References to « formerly » reflect that older taxonomy. ATTRIBUTION Some of the ideas in this lesson may have been adapted from earlier, unacknowledged sources without our knowledge. If the reader believes this to be the case, please let us know, and appropriate corrections will be made. Revised again to reflect biological relationships based on recent studies and reports in genetics and molecular biology: March 2006. The following pages are in Adobe Acrobat pdf format in order to maintain their intended layout for easy printing of handouts. PDF on list, add it if it isn’t, then click OK to activate it.