BIOL 1004 Lecture Notes - Lecture 11: Global Warming, Reduced Properties, Adaptive Radiation
8 Dec 2017
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Document Summary
Comparison of dna sequences date common ancestor of multicellular eukaryotes to 1. 5 billion years ago. Oldest known fossils of multicellular eukaryotes are small algae that lived about 1. 2 billion years ago. The ediacaran periods was the last of early animals period. Was when we first started seeing multicellular organisms. The cambrian period was the start to see fossils of organisms that could be ancestors of living things today. The cambrian explosion was the start seeing fossils all the major animal groups we have today. Colonization of land we see plants, fungi, and animals (vertebrates, arthropods) about. Plants and fungi today form mutually beneficial associations and likely colonized land together. Mass extinctions: (cid:894)rapid, glo(cid:271)al, affe(cid:272)t (cid:373)a(cid:374)(cid:455) ta(cid:454)a (cid:862)group of orga(cid:374)is(cid:373)s(cid:863)(cid:895) Extinction can be caused by changes to a species environment. The rate of extinction increased dramatically and that is so called mass extinction, which result of disruptive global environmental changes.
