BIO153H5 Final: BIO153 Exam Notes- All Covered Chapters.pdf
Document Summary
Section 27. 1 outline: tools for studying history: phylogenetic trees. Chapter 27: phylogenies and the history of life. They rapidly eliminate most of the species alive in a more or less random manner. The evolutionary history of a group of organisms is called a phylogeny. A phylogenetic tree shows ancestor descendant relationships among populations or species. Sine genes that are absent in other artiodactyl groups (figure 27. 7c). Soon after that, animals diversified into almost all the major groups extant today. This is known as the cambrian explosion. Section 27. 3 outline: the cambrian explosion. The doushantuo microfossils: researchers identified sponges, cyanobacteria, and multicellular algae in samples dated 570 580 mya. They also found what they concluded were animal embryos in early stages. The number of genes in the hox cluster appears to have expanded during the course of evolution. Chapter 28: bacteria and archaea: bacteria and archaea have a profound impact on humans and global ecosystems.
