BIOL 1604 Lecture Notes - Lecture 1: Allopatric Speciation, Soltyrei, Gene Flow
Document Summary
Science of zoology and evolution of animal diversity. Ways to study animals (we coexist with many different animal species. Live organisms in their habitat (different life stages) Heterotrophic (cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter) Development includes a blastula (sphere of cells surrounding a fluid filled cavity) Biological species concept: most popular, a population or group of populations whose members can interbreed and produce fertile offspring. Typological (morphological) species concept (no longer accepted) Species: based on shared features and common ancestry. Phylogeny/phylogenic tree: depicts the history of animal life as genealogical tree earliest species ancestral to all animals at the trunk, all living animal species at tips of the branches. 2 goals of scientific study of animal diversity: Reconstruct a phylogeny of animal life and find where in evolutionary history we can locate origins of major characteristics: multicellularity, coelom, spiral cleavage, vertebrae, homeothermy.
