BIOL 2200 Lecture Notes - Lecture 3: Antimicrobial Resistance, Herbicide, Lactase

• School: University of Virginia
• Department: Biology
• Course: BIOL 2200
• Professor: Jessamyn Manson

Document Summary

Galapagos finches: darwin observed that many similar birds had different beak sizes, making them different species, differences in food availability and seed sizes lead to different beak sizes. Ar(cid:373)or produ(cid:272)tio(cid:374) is : armor production is costly, lower ion concentration in lakes, ions needed for bone growth, fish with reduced armor in lakes: Breed sooner: disadvantageous to have lake armor because its costly to build, bigger, breed sooner therefore require more resources, but lake has limited sources. Slide 8: black line with circles represents a morph where eda is poorly expressed. Exception proves the rule: lo(cid:449) ar(cid:373)orlake (cid:272)lea(cid:374)up i(cid:374) (cid:1005)96(cid:1004)"s led to i(cid:374)(cid:272)reased (cid:449)ater (cid:272)larity, higher visibiity led to higher predations rates, agent of selection is the trout (predators) Benthic vs. limnetic sticklebacks: freshwater sticklebacks have 2 phenotypes- limnetic and benthic, limnetic feed on plankton in open water, benthic sticklebacks feed on invertebrates near the lake bottom. Evolution of resistance: antibiotic resistance, herbicide resistance, pesticide resistance.