PPT-No mass extinctions

Very general images What is with the zig zag Has the earth coolingshows really deep time Shows Cambrian Explosion period Mentions algae and eukaryotic cells Has all groups Nice sense of how things evolved Not straight hard to follow Hard to tell . Mass extinctions are global events characterized by unusually high rates of extinction The magnitude of these rates is usu ally unspecified but it is generally significantly higher than the rate of so called background extinctions that is extinc tio At night they use their natural jet propulsion to maneuver up over 325 meters to feed. . Why an “explosion”?. What were conditions like at the end of the . Proterozoic. ?. . Supercontinent was breaking up. . Rachel. . Finck. May 7, 2014. Measure. by TOF. Stimulate. cells . in vitro. Crosslink. proteins. Stain with . isotope . tagged Abs. Nebulize . single-cell. droplets. Ionize. (7500K). Permeabilize. entire branch.Global extinction re The Sixth Mass Extinction. Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. The sixth . m. ass . e. xtinction. Objectives. Define . extinction.. Give examples of (1) past mass extinctions (2) and recent species . extinctions.. Compare current extinction rates with background extinction . Modern Extinctions. In the tropical Pacific, 154 species, mostly birds of large size, those that nested on the ground, and those that were flightless were the first casualties (Boyer 2008, 2009). In . What is extinction? . Extinctions occur when the last individual of a species dies out. . Functional Extinctions occur when individuals remain but the odds of sustainable reproduction are low. i.e. the species is effectively extinct even though individuals remain. . 99.9% of all living things that have ever existed on earth have gone extinct. earth has experienced 5 five extinctions . Geologic time scale. Era. Largest unit of geologic time . lasts tens to hundreds of millions of years and consists of two or more periods. . Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. Mass Margin Mass Limit or Mission Limit Mass Reserve Mass Growth Allowance (MGA) Mass Margin Mass Limit or Mission Limit Mass Reserve Mass Growth Allowance (MGA) dm dmxydmxzdmxydmdmyzdmxzd Unit . 2: Causes of Mass . Extinctions. Rebecca Teed (Wright State University). Objectives. By the end of this exercise, you should be able to:. Explain how the effects . of either flood-basalt eruptions or . Extinction . When an organism is classed as extinct there are no living members of that species left. Extinction is a natural process where organisms that are less suited to an environment die out. Throughout the history of earth there have been several mass extinction events . Will M. Farr. Northwestern University, CIERA. (See . Kreidberg. , . Bailyn. , WMF, . Kalogera. , arXiv:1205.1805). The Mass Gap. Strange, because main-sequence mass distribution . rising. at low M. (.