BIOL108 Lecture Notes - Laminaria, Chloroplast, Continental Drift
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BIOL108 Full Course Notes
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Monday, february-23-09: last time, finished key events: the invasion of land and continental drift, begin topic 5, the protists, protist characteristics, supergroup excavata, today, supergroup chromalveolata. Phytoplankton floats around on their own: many are bioluminescent. Do this to attract the predators of their predators. Then the predators that are eating the dinoflagellates get eaten by their predators. The burglar hypothesis: many are symbionts. Coral reefs : many dinoflagellates exhibit population explosions. Red tides (red from xanthophylls: dinoflagellates that go crazy with their growth, e. g. Pfiesteria: massive fish kills from neurotoxins secreted by the dinaflagellates occur, responds to anthropogenic nutrient loading ( eutrification , put a lot of nutrients into a water system causing the dinoflagellates to grow excessively. Plasmodium malaria: requires 2 hosts for its life cycle: mosquito and humans, malaria dominates in tropical areas where mosquitoes live. 1. 5 million deaths/year most are children: equivalent to 10 boeing 747s full of children crashing every day of the year.