BILD 3 Chapter Notes - Chapter 19: Koelreuteria Paniculata, Aureus, Marsupial
30 May 2016
School
Department
Course
Professor
Document Summary
Uses their beak, a hollow, needlelike mouthpart, to feed on seeds located within the fruits of various plants. Soapberry bugs feed most effectively when their beak length closely matches the depth at which the seeds are found within the fruit. Goldenrain tree fruit have seeds closer to the fruit surface than the seeds of the balloon vine fruit. Natural selection would result in beaks that are shorter in populations that feed on goldenrain tree than those in populations that feed on balloon vine. An example of ongoing natural selection that dramatically affects humans is the evolution of drug- resistant pathogens. Bacteria over a few years develops new ways to combat the antibiotics given. The s. aureus and soapberry bug examples highlight two key points about natural selection. Natural selection is a process of editing, not a creative mechanism. A drug does not create resistant pathogens; it selects for resistant individuals that are already present in the population.
