Biology 1201A Chapter Notes - Chapter all: Color Blindness, Dwarfism, Barr Body
14 Oct 2016
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Venus flytrap a leaf specialized to trap insects and edges lined with bristles, black trigger hairs (trichomes) that spring the trap and the red colour that attracts prey. Australian sheep bowflies occur throughout australia in habitats ranging from urban to rural settings, in semi-arid open lands & forests and have spread throughout the world, including eastern canada. Female fly lays eggs in open wounds on livestock such as sheep. Eggs hatch into maggots and eat flesh and damage wool. Organophosphate insecticides are effective because they affect the nervous system and kill both adult flies and maggots. Some bowflies have a mutation that makes them resistant to insecticides. Selection associated with the pesticide changes the population structure of sprayed flies, eliminating nonresistant ones. This is an example of how the combination of genetic-based changes and strong selective pressure has altered the population over time (evolution)
