Classification. Essential Question Why is it important to place living things into categories?. 18.1 History of Taxonomy Objectives. Describe Aristotle’s classification system, and explain why it was replaced.
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Why is it important to place living things into categories?
*Note: Phyla and family were not in Linnaeus’s classification system but were added by modern scientists.
See Table 18-1 on page 338 :Classification Hierarchy of Organisms
Flowering plant (Poinsettia)
a) attachment of virus to host cell
b) injection of viral DNA
c) Integration of the viral DNA into host genome, and
d) Multiplication of the host cell with the viral DNA.
Lysogenic cycle of a temperate bacteriophage
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