BIS 2B Lecture Notes - Lecture 3: Great American Interchange, Isthmus Of Panama, Oceanic Trench

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: Mark Schwartz; Sharon Strauss

Document Summary

Continue from last lecture similar fossils across different continents vicariance. Wallace"s line = biotic interchange and its limits there"s a line right through indonesia = ocean trench. Ex: divides bali and lombok such diversity. Principle of allocation = all life functions cannot be simultaneously optimized / a. k. a. you can"t do everything at once. Autotrophs = can live exclusively on inorganic sources of carbon, nitrogen, others. Photoautotrophs = sun power to metabolize, grow, and gather resources. Photosynthesis (bis 2a) = 6co2 + 6h2o + sun = c6h12o6 + 6o2. C3 photosynthesis = every step in the process happens in chloroplasts; most ancient and common technique trade-off = more carbon dioxide, but lose more water; better at low temp but not high temp. C4 = more water-efficient; common in grasses trade-off = need more energy to be efficient in carbon transportation; better at high temp but not low temp.