Bio_Outline_Lecture_11

Bio_Outline_Lecture_11 - Bio Outline Lecture 11 Viruses and...

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Bio Outline Lecture 11 Viruses and the nature of life 1. A reminder: what is alive? –organized and self replication 2. What are viruses? –outgroup to life have DNA or RNA, circular or linear genetic material, single or double stranded, no cytosome or plasma membrane, organized, cannot self replicate (require a host) 3. Life or not life? –not life b/c don’t self replicate 4. Virus structure and reproduction- Reproduce through infection (parasitic) Helical- can hold more in less space/ Icosohedral: 20 iso triangles Binal- 2 shapes- head and body shaped differently 5. Slow viruses- prions which contain no genetic material/ made of protein/ not transmitted through DNA/ cause TSE The tree of life 1. The real tree of life vs. : Taxonomy (analagous traits) vs Phylogeny (genetic data) 2. Our view of the tree- six kingdoms 3. The three domain model is a better system: Bacteria, Archaea, Eukarya 4. Diversity is noted in different ways for different organisms 5. Bacteria and Archaea- may not be as closely related as once thought
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This note was uploaded on 12/09/2009 for the course BIO 200 taught by Professor Herreid during the Spring '07 term at SUNY Buffalo.

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Bio_Outline_Lecture_11 - Bio Outline Lecture 11 Viruses and...

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