Chapter 18

Chapter 18 - Chapter 18: Systematics: Seeking Order Amidst...

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Chapter 18: Systematics: Seeking Order Amidst Diversity  16:15 Taxonomy is the branch of biology concerned with naming classifying the diverse forms  of life on our planet.  Homo sapiens  Sciaenops ocellatus  There are many ways that things may be grouped: Example: Plants verses animals:  One of the early classifications placed the animals in one group and the plants in  another. The bacteria, fungi and protists were considered plants while some of the  protists were grouped with the animals.   Now there are 3 domains:  The 3 domains and the kingdoms within them each have observably different attributes  that define them.  Bacteria Archaea Eukarya  Animals Fungi Plants Protists  Every living thing has a common ancestor.  Taxonomic categories:
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1. The organization of taxonomic grouping arranges organisms in sets.  2. Each set is then grouped with other sets into a larger set.  3. The major taxonomic categories from most inclusive (biggest set) to least  inclusive (smallest set) are:  Domain Kingdom o Phylum  Species:  o Species is the biological group which includes all the organisms which are (or  have the potential for) interbreeding=biological species concept.  o Many species were originally distinguished by morphology: if two organisms  Historically, taxonomy is an inexact process.  Organisms which were once placed together in a certain classification group have been  separated when new or better  Biodiversity: One thing is very clear, the more biologists look, the more species are found.  There are about 1.4 Million identified species and possibly 5 to 75 times more which  have not been classified. 
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Ch. 19 The Hidden World of Microbes 
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This note was uploaded on 02/06/2012 for the course BIO 1002 taught by Professor Hrinchevich during the Fall '10 term at LSU.

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Chapter 18 - Chapter 18: Systematics: Seeking Order Amidst...

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