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Ch. 41 questions

Environmental Microbiology and Genetic Engineering

Give an example of how scientists have used gene cloning to protect plants from insects insect toxin genes from B. thuringiensis have been cloned into plants so pland produces the insecticide right on the leaves-when leaves eaten larvae are killed
What is BOD? biochemical oxygen demand: rate at which microbes remove oxygen from water
what is the purpose of alum in water purification? alum forms a gel that microbes and particles stick to as gel settles out and removes them
What have we learned from the use of DDT? pesticides like DDT may harm animals too-need to develop and use pesticides that are quickly broken down by microbes or other means
What are lichens? mutualistic colonies of algae and fungi
What digests the cellulose of wood in termites? protozoa digest cellulose of wood in termites
what type of organism produces methane? archaea
Ammonification breakdown of proteins and nucleic acid by bacteria and fungi to release nitrogen in the form of ammonia
Nitrification oxidation of ammonia to nitrate by the bacteria Nitrosomonas and Nitrobacter
Denitrification occurs when bacteria use nitrate anaerobically and release nitrogen gas
Nitrogen fixation process of bacterial fixation of nitrogen gas into nitrate-2 bacteria that fix nitrogen--Azotobacter and Rhizobium
Azotobacter free living
Rhizobium grow in plant root nodules to fix nitrogen in larger quantities
Created by: heatherlvn