Biology 1A Study Guide [SJSU] Essay

974 WordsFeb 5, 20144 Pages
Exam 1 Study guide Chapter 1: Biology and Tree of Life • What are the five fundamental characteristics of all living organisms? - Energy - all organisms acquire and use energy - Cells - made up of membrane-bound cells - Information - process heredity info. encoded in genes as well as info. from environment - Replication - all are capable of reproduction - Evolution - populations of organisms are continuing to evolve • What is the cell theory? - All organisms are made of cells (pattern), and - All cells come from pre-existing cells (process) • What are the three major groups of organisms? - Eukaryotes - Eukarya - Prokaryotes - Bacteria/Archaea • What is a phylogenic tree? -A phylogenetic tree reflects…show more content…
Coelomates have an enclosed body cavity, which means advance muscle structure, enhanced locomotor capabilities, and more structural integrity. * Fluid – filled cavity allowed for the evolution of a hydrostatic skeleton for movement (evolved out of animals having a coelom) • What is the difference between protostomes and deuterostomes? Protostomes (arthropods, mollusks, and worms): Pore becomes mouth Deuterostomes (chordates and echinoderms): Pore becomes anus • What are the different feeding types? Suspension feeder – “filter feeder”: capture food by filtering out particles suspended in air or water (ex. baleen whale and krill shrimp) Deposit feeder – eat their way through substrate (ex. worms) Fluid feeders – suck or mop up liquids like nectar, blood, plant sap, etc (ex. hummingbirds) Mass feeders – take chunks of food into their mouths (ex. humans) Chapter 5: Evolution by Natural Selection • What is the evolutionary theory? According to evolutionary theory, species: 1. Change through time 2. Are related by common ancestry • What are vestigial traits? Incompletely developed/ non-functioning structure • What is structural homology? Adult morphology [same bones, different sizes and places] • What is genetic homology? DNA sequences • What is developmental homology? Embryos • What are the four steps of Natural selection? 1. Variation

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