BIO 1130 Lecture Notes - Lecture 3: Aquatic Feeding Mechanisms, Pinacoderm, Nephridium

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Extremely important point in time: diversity of planet found, origins of multicellular life/ organisms. Paleozoic era: cambrian, ordovician, silurian, devonian, carboniferous, permian. Ends with permian: 95% of biological diversity gets wiped out, all starts over again, one of the greatest wipe outs in the history of biology. Equator: maximal solar input, moving across the poles biodiversity decreases. Laurentia: rock, huge continental plate, first multicellular animals arose here. Weirdest animals lived in these oceans: cambrian biota/ cambrian animals, no longer on planet, huge array of organisms, burgess shales yoho national park in bc. Mud slides below water where there was no oxygen and organisms would die and get crest together in shales. You can dissect them and find out what they have they been eating. Huge experiments of body limbs and types. Big finding from fossils: huge array of unusual organisms never seen other than the cambrian explosion, arthropods make an appearance. Invertebrates choanocyte: very beginning the common ancestor is the.