BIO 1130 Lecture Notes - Lecture 7: Centriole, Cytoskeleton, Centrosome

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Eukaryote cells deals with the development of the domain eukarya. Ends with single cells joining together to form multicellular organisms. Unbranched with membrane ester links ester links ester links. These characteristics helped determine that luca must have been an anaerobic bacteria, which then developed into archaea. Luca being a bacteria makes panspermia unlikely, because bacteria are not extremophiles, and most likely would not have been able to survive the journey. Nuclear envelope: as bacteria get larger, they fold their pm to increase the surface to volume ratio, some of the folds fused and created the nuclear envelope. The genome can replicate faster: chromosomes create more variation, random segregation: 2n possible combinations in gametes (n = # of chromosomes, gene recombination: crossing over. Where prokaryotes use horizontal gene transfer to create variability, eukaryotes use chromosomes and crossing over) Microtubules: tubular array is the guide service for molecular motors: acts like railways for the molecular motors.