BIO SCI 94 Chapter Notes - Chapter 1-35: Cambrian Explosion, Coevolution, Mycorrhiza

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Nancy Burley

Document Summary

2 part def -- pattern and process. Fitness -- boils down to reproductive success. Ns -- fittest individuals produce the most offspring, which changes allele frequency over time, selecting for access. Postzygotic isolation -- happens after the zygote has been formed. Herbivory -- herbivores (+) eat plants (-) Parasitism -- parasite (+) gets resources from host (-) Competition -- negative interactions between taxa in attempt to gain resources (-/- Precambrian (4. 5 bya - 543 mya): origin of all 3 domains, o2 revolution, Paleozoic (543 mya - 251 mya): colonization of land by plants (once), fungi, protostomes (multiple times), amphibians. Mesozoic (251 mya - 65 mya): origin of angiosperms, dinosaurs, birds, mammals (251 - 65 mya) Cenozoic (65 mya - present): origin of apes. Prokaryotes -- unicellular, haploid, no membrane-bound organelles, or nucleus, circular chromosome, reproduce via fission (table 29. 1) Unique b/c of metabolic diversity (know 6 categories in table 29. 3) Some fix nitrogen; origin of oxygenic photosynthesis (cyanobacteria)