BIOLOGY 1B Lecture Notes - Lecture 7: Experimental Evolution, Bacteriophage, Subtypes Of Hiv
6 Apr 2016
School
Department
Course
Professor
Document Summary
Monday, september 16, 2013: experimental evolution laboratory: Evolutionary biologists often carry out evolution in the laboratory, to test ideas about how evolution occurs. For example, andy ellington"s lab (ut austin) has evolved aptamers that bind to the rev protein of hiv-1. There has been a long-term study at the. State agricultural laboratory in illinois, running since 1896, in which oil content is selected for in corn: michael rose selected for long life in flies: all multicellular creatures age. In mammals, risks for cancer, cardiovascular disease, and various types of reproductive failure increase with age. In insects, cancer is rare, but other types of problems increase with age, such as missing body parts and reduced physiological ability. Mice live about three years, whereas humans live about 80 years. Our closest relative, the chimpanzee, only lives about 50-60 years, even when kept in benign environments. Organisms deteriorate because natural selection acts more effectively in young than in the old.
