BSC 2010 Study Guide - Midterm Guide: Nitrogen Fixation, Nitrogen Cycle, Carbon Fixation
Document Summary
Chapter 27: background extinctions- environmental changes, diseases unoccupied niches and adaptive radiation, 2 major mass extinctions: the permian and cretaceous (dinosaur) extinctions. Flood basalts that led to the spread of toxins among many organisms and rocks indicating the ocean to be anoxic . Iridium was commonly found in sedimentary rocks, which is a main component in asteroids and meteorites. Distributions of shocked quartz were also found: natural selection background extinctions only, hypothesis of surviving mammals long periods of darkness and cold affect larger organisms than smaller organisms. Hierarchical classification of life: domain, kingdom, phylum, class, order, family, *kinky people can offer fun good sex (d on top: 3 domainsof life: archaea, bacteria, eukarya. Not placed with bacteria because dna, rna, proteins, ribosomes more similar to eukarya : different composition of plasma membrane. Cell wall composed of phospholipids in the plasma membrane. Most abundant organisms (both in numbers and biomass)
