BIO 124 Lecture Notes - Lecture 6: Evolutionary Developmental Biology, Cenozoic, Feathered Dinosaur
6 Apr 2016
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Document Summary
Macroevolution- process of decent w/ modiication that occurs above the species level. Fossil- remains of ancient life (preserved in sedimentary rock) Trace fossils- marks/ structures made by organisms during their life. Radiometric dating- rate at which unstable isotopes break down. Relative dating- relationship between strata, fossil, & other rocks to reconstruct history. Geological timescale- marks divisions between major time periods. Adaptive radiations- periods of time where a clade forms many new species illing signiicantly diferent niches. Glacial cycles- land masses move, climates change, species move & redistribute. Cyanobacteria photosynthesis oxygen released into atmosphere. Moist and warm widespread drying cooling deep freeze. Ice ages- series of glacial & interglacial periods. Evodevo (evolutionary developmental biology)- major changes in body form that can result from minor changes in sequence & regulation of developmental genes. Heterochrony- evolutionary change in rate/ timing of developmental genes. Paedomorphosis- rate of reproduction development accelerated to somatic development.
