BIOL 304 Lecture Notes - Lecture 17: Jonathan Weiner, Gammarus, Ancient Dna
Document Summary
Baikal - cold, very deep (1. 6km), see organisms not found anywhere else (endemic fauna) Not many competitiors as compared to other systems. Ancient dna sequences can be used to establish moa phylogenies (mt dna for moas) Galapagos islands -> finch beaks (read jonathan weiner, finches & the beak) Failure of divergence likely due to competitive exclusion. Insects cannot be big -> rely on diffusion to pump gas inside abdomen. Warm blood evolved independently in mammals and birds. Used extensivelyt by bats (communication, find prey, sense surroundings) Evolved many times in bats, but only once in cave swifts (birds) Insectivorous plants, usually in n-poor habitats (need an external nitrogen source) Pitcher [;lanmts produce enzymes secreted in water in pitcher; some communities of insects are adapted to this environment and can live there. Acquiring cellulose through parallel gene transfer from bacteria.
