Global spatial scales
Asteroids and mass extinction
Army ant biogeography and molecular clocks
Dating with isotopes
C decreases in half of its original concentration every 5,370 yrs
Cladogensis vs. Anagenesis How many species are there? What is a species?
Species concepts Problems with species concepts
Population species, how?
Modes of speciation Species names vs. species as entities
Cladogenesis vs. anagenesi
Evolution by Natural Selection requires
reproduction heritability of traits variation in success
What is Eusociality?
Advanced form of social organization (3 criteria):
Traits that increase reproductive
success get passed onto
Level Biosphere Ecosystem Community Population Multicellular individual
Emergent properties: result from interactions among component parts global circulation patterns (e.g., El Nino), global change nutrient cycling trophic interactions, stabili