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Lecture 6

Lecture 6 - Protists II.pdf

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Christoph Richter

Lecture 6 - Protists Thursday, 23 January, 2014 1:17 PM Today's Topics: Announcements: Homework:  Protists  Bio seminar - Lyle White Lab 2 Study for test Lecture Topic: Test on 2014-02-04  Multiple choice  Bring pencil, student card, eraser  Material will include: ○ Lectures 2-8 (up to and including Plants III) ○ Assigned readings: ch. 27.1-27.3(excluding Fig. 27.8-27.10) ○ Assignment 1, Q.1  How to study ○ Read assigned readings, pay attention to figures and boxes ○ Focus on chapter review and "check your understanding" boxes ○ Practice with end of chapter questions ○ Practice with mastering biology questions ○ Go through lecture notes ○ Remember:assigned readings that are not coveredin lecture are still required knowledge Infoldings of the plasma membranesurrounding the eukaryotic ancestor explains what phenomenon in the evolutionof protists? a) Primary endosymbiosis b) Secondary endosymbiosis c) Developmentof the mitochondria d) Origin of the nuclear envelope e) Evolution of the chloroplast Protists are a paraphyletic group • Groups not considered protists are on the branches of the tree which contains all protists: ○ Land plants ○ Fungi ○ Animals • Examples of protists: ○ Plasmopara viticola - a protist which destroys leaf tissue  A large issue with French wine vineyards  The attempt to solve the aphid infestation problem at the time resulted in downy mildew due to these protists  First fungicide ever developed: combinationof lime and copper sulfate □ Was discovered by accident - plants near the roads were less affected by water mold □ This was because the mixture was sprayed on them to prevent people from picking them ○ Phytophthora infestans caused the Irish potato famine  Caused water mold in the potatoes, causing mass exodus from Ireland to North America to North America Protists have a range of innovations • They evolvedstructures for support and protection ○ The first were Ceratium tripos and Ceratium fusus  Dinoflagellat
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