ENWC 201 Final Canvas Quizzes - Questions with Verified Answers

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ENWC 201 Final Canvas Quizzes - Questions with Verified Answers Chronic wasting disease (CWD) is a. caused by an infectious fungus which causes bats to wake up in the middle of the winter, wasting e... nergy, and eventually killing them b. caused by a non-infectious heavy metal toxin that bioaccumulates in bird stomachs until the bird is no longer able to digest food, causing it to waste away c. caused by an infectious misfiled protein, or prion, that creates vacuoles in a deers brain and alters their behavior to the point that they slowly die from starvation d. a form of mange that causes bears to lose all of their fur, thus chasing their appearance to look much skinner than normal Starvation is not considered a disease as it is not infectious and thus can not be "transmitted" from one animal to another a. true b. false Brown tree snakes in Guam are an example of a. an introduced commensal which is affecting bird species by improving the resilience of other reptiles to chytrid fungus b. an introduced ecosystem engineer that is changing bird habitat by dispersing tree seeds and altering canopy cover c. an introduced competitor which is affecting birds on guam by eating the same spider species that they birds rely on d. an introduced predator species that is affecting populations of birds directly through predation Zebra mussels were carried into the great lakes in the ballast water of tanker ships. They were brought frequently, arrived in good health and in large numbers. This is a high ______ ______ meaning they are more likely to be a successful invasive species fill in the blank propagule pressure Starlings were introduced to the US by Shakespeare enthusiasts. The birds have since spread across the US and are out-competing native birds (like the blue bird) a. true b. false Although greenhouse gases are important for maintaining earth's climate, as we increase the amount of them in our atmosphere we are causing more long wave radiation to be captured/reflected back to the earth, thus causing warming. Similar to how a greenhouse works for plants a. true b. false Increasing levels of acidity in our oceans (lower pH) is leading to an increase in the availability of free calcium, we will thus see an increase in the number of small organisms such as diatoms and dinoflagellates that are at the bottom of the food web a. true b. false If spring leaf date in our eastern forests continue to be earlier and earlier, but migratory song birds return at the same time as always from central and South America, we may see what is called a ______ mismatch. Breeding birds may suffer because they will miss critical food supplies tied to the leaf out date of trees a. phenological b. genetic c. range of tolerance d. space shifting This disease is carried by bison and is of great concern to ranchers bordering Yellowstone a. bovine spongiform encephalopathy b. brucellosis c. mastitis d. paratuberculosis The IUCN red list is used to track whether species from across the world are threatened with extinction a. true b. false When the extinction of a species is followed by extinctions of several other species due to the disruption of losing the first species, we call it a "waterfall effect"' a. true b. false Select the appropriate value classification for each of the following statements options: a. utilitarian (goods) b. utilitarian (services) c. utilitarian (information) d. inherent 1. I feel that koalas have a right to exist, regardless of whether they are of a benefit to my own well being 2. I value deer as a food resource and enjoy harvesting them for meat 3. every time I take an aspirin i appreciate the fact that the formula was originally derived from the bark of a willow tree 4. I value dung beetles for their effectiveness at decomposition of cattle feces, as it helps limit infestations of various flies which lay eggs on cowpies 1. d 2. a 3. c 4. b [Show More]

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