BIOL 111 Lecture 1: BIOL 111 - NOTES
44
BIOL 111 Full Course Notes
Verified Note
44 documents
Document Summary
Clade: a monophyletic group (includes ancestral group and all its descendants. Taxon: a named group of organisms at any level of a phylogenetic tree, ex: mammals or homo sapiens from each other, making it hard to resolve which split of. Polytomy: populations likely split very rapidly earlier or later. Homoplasy: similarity due to convergent evolution, similar function: bat wing would be considered homologous. History of life: in brief (the last five minutes!) Earth, but life itself also brings about physical changes to earth. Light e splits h2o, organisms use free electrons to reduce co2, build organic molecules. Possible causes of cambrian explosion (not mutually exclusive) Higher oxygen levels made big, mobile animals possible. The evolution of predation exerted selection for hard parts, exoskeletons, and rapid movement. New niches beget more new niches. animals moved of the ocean floor, which led to the development of new habitats.
