Bis2C.Fall2010.L11

Bis2C.Fall2010.L11 - 1 Lecture 11 BIS 002C BIODIVERSITY AND...

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Unformatted text preview: 1 Lecture 11 BIS 002C BIODIVERSITY AND THE TREE OF LIFE Lecture 11: Microbial Eukaryotes Tuesday, October 12, 2010 2 Where we are going and where we have been Previous lecture : ! 10. LGT and Intro to Microbial Eukaryotes Current Lecture: ! 11. Endosymbioses Next Lecture: ! 12. Extremophiles and how to study microbes Tuesday, October 12, 2010 Outline Metabolic diversity ! Bacteria and archaea can do everything ! Eukaryotes, not quite so ! Solution: Symbioses Endosymbioses ! Mitochondria ! Chloroplasts 3 Tuesday, October 12, 2010 A. Midterm 4 A. Midterm Tuesday, October 12, 2010 Midterm 5 Study Guides Will Be Posted Tomorrow Test Will be a Mix of: True-False Multiple choice Interpretation of diagrams Short answer Will cover Lectures 1-13 Review/Q&A Session Will Be Scheduled Tuesday, October 12, 2010 Midterm Monday Bring: 1. Pencil and pen 2. Eraser 3. Picture ID UCDavis 6 Tuesday, October 12, 2010 B. Using the phylogeny 7 B. Using the phylgoeny Tuesday, October 12, 2010 8 Tuesday, October 12, 2010 Fungi Animals Land Plants 9 Brown algae Evolution of Multicellularity Slime molds Charophytes Tuesday, October 12, 2010 Tuesday, October 12, 2010 11 What is peptidoglycan? A. The main component of bacterial biofilms B. A component of the archaeal cell wall C. A component of the bacterial cell wall D. A pigment used in photosynthesis Tuesday, October 12, 2010 Which of the following statements is the most convincing evidence that mitochondria and chloroplasts are derived from bacteria (as opposed to from other microbes or from some endogenous eukaryotic evolution)? A. They contain their own DNA B. They look like bacteria in shape and structure C. Some contain peptidoglycan in their cell envelopes D. They carry out important metabolic processes Tuesday, October 12, 2010 Hints that chloroplasts and mitochondria once were bacteria ! Surrounding by 2 or more cell membranes " Inner one looks like bacterial membranes ! Morphologically resemble bacteria ! Many contain their own genomes and encode some proteins and RNAs ! Many components resemble those of bacteria Tuesday, October 12, 2010 Evolution of Plastids Scattered distribution across the tree of eukaryotes Tuesday, October 12, 2010 N M N M N M N M N M N M N M N M N Evolution of Mitochondria + + + +- + + + + Present in most species but absent from a few lineages Tuesday, October 12, 2010 C. Mitochondrial evolution 16 C. Mitochondrial evolution. Tuesday, October 12, 2010 4.13 A Mitochondrion Converts Energy from Fuel Molecules into ATP Tuesday, October 12, 2010 N M N M N M N M N M N M N M N M N Most eukaryotes have a mitochondrion Questions: Are mitochondria derived from bacteria?...
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Bis2C.Fall2010.L11 - 1 Lecture 11 BIS 002C BIODIVERSITY AND...

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