BIO 1130 Lecture Notes - Lecture 1: Nerve Net, Motility, Gastrodermis

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

Document Summary

Animals and fungi and plants move forward. Starts in the ocean with the first multicellular organism. Silurian era; single celled-photosynthetic organisms turn into multicellular organisms - Invertebrate organism appear in the ordovician ear plants appear on land in this era. Insects also make appearance to chop on these plants. In the ocean; one of the first vertebrates: fishes make an appearance and become the dominant vertebrate form. The co2 levels were so low that o2 was up to 30% in the atmosphere. Permian extinction; almost more than 50% of the biodiversity disappears. Since 1960, almost 67% of vertebrates have disappeared. We are in the middle of the sixth mass extinction to have ever occurred. Very important; equatorian environment because at the equator; we have large amounts f rainfall; highly productive zone. There is this large continental mass with a huge continental shelf sitting around it: they are sitting in one of the best lit, warmest part of the planet.