ENWC 201 Final Study Set Latest Updated 2024

ENWC 201 Final Study Set Latest Updated 2024 chronic wasting disease (CWD) is a. caused by an infectious fungus which causes bats to wake up in the middle of the winter, wasting energy, 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 - CORRECT ANSWER-c 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 - CORRECT ANSWER-b 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 - CORRECT ANSWER-d 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 - CORRECT ANSWER-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 - CORRECT ANSWER-a 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 - CORRECT ANSWER-a 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 - CORRECT ANSWER-b 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 - CORRECT ANSWER-a this disease is carried by bison and is of great concern to ranchers bordering yellowstone a. bovine spongiform encephalopath