L4 - Origins of Eukaryotes

L4 - Origins of Eukaryotes - Origins of Eukaryotes:...

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Origins of Eukaryotes: Protists Protists Proto = First Common feature = tend to live in environments where they are surrounded by water Marine = Shallow Water NOTE: Abundant in aquatic environments All eukaryotes that are not o Animals o Plants o Fungi VERY DIVERSE o Wet soils, forest floors o Autotrophic or Heterotrophic o Most are single cellular, but also can be unicellular, colonial, mutlicellular o Sexual + Asexual Impact on Human Health: o Can cause human disease + plant disease o Ex) irish potato famine of 1845, caused by Protists o Malaria = caused by a parasitic protist Ancient diseases Birds, snakes Mice, lemurs, monkeys, apes Transmitted through misquoitos Mortality is ~ 1.2 millions deaths/year Most are young children
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Estimates ~ 3000 children die/day in Africa Plasmodium in mosquoito, penetrates Red Blood Cells (feeds on cells & destroys) o Trypanosomes (sleeping sickness) Human Pathogens Change cell – surface antigens to avoid immune response o Giardia Lamblia = Single Celled Protist
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This note was uploaded on 04/12/2011 for the course BIO 153 taught by Professor Dr.arts during the Winter '11 term at University of Toronto- Toronto.

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L4 - Origins of Eukaryotes - Origins of Eukaryotes:...

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