, Points Earned:, 1/1 Correct Answer:, A Your Response:, A 8., A larger national park and a smaller national park, otherwise identical, are completely surrounded by cornfields and Walmart parking lots, and have been surrounded for a century. You count the number of species of trees in each park. You probably will find:, A., More species in the larger park, because it is more likely to have a Diet Pepsi distributor who pours acidic drinks on the inhabitants. B., More species in the larger park, because it can hold more individuals thus reducing the risk of extinction.C., More species in the smaller park, because the smaller size has caused faster evolution.D., More species in the smaller park, because it lacks predators that keep diversity down.E., The same number of species in the smaller park as in the larger park. Diet Pepsi distributors are too smart to go around pouring drinks on beetles and bison; the bison might butt back! For evolution to make new species usually will take thousands of generations or longer, so a century is not long enough for new types to have appeared. The larger populations, which help prevent extinction, that are possible in the larger park will cause it to have more species. , Points Earned:, 1/1 Correct Answer:, B
Your Response:, B 9., Which formula describes the chemical changes that occur and release energy as plant material is burned in a fire or “burned” in a stomach? , A., CH 2 O + O 2 &rarr CO 2 + H 2 O B., Ca +2 + 2HCO 3 - &rarr CaCO 3 + H 2 CO 3 C., Diet_Pepsi + Graham_Spanier &rarr Diet_Graham_Spepsier D., CO 2 + H 2 O &rarr CH 2 O + O 2 E., CaCO 3 + H 2 CO 3 &rarr Ca +2 + 2HCO 3 - CaCO3 is shell or cave-rock; the equation with CaCO3 on the left is dissolution of rock to make caves, and the equation with CaCO3 on the right is formation of shells. CH2O is a pretty good estimate of average plant composition; the equation with CH2O on the left is burning of plant material for energy, and with CH2O on the right is how plant material is made. We’re not sure just what Diet_Graham_Spepsier might be, but it isn’t general plant material. , Points Earned:, 1/1 Correct Answer:, A Your Response:, A 10., Oxygen (O2) and nitrogen (N2) do not have much greenhouse effect, but several trace gases including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and various chlorofluorocarbons are important greenhouse gases. The primary mechanism by which these greenhouse gases warm the Earth is:, A., Absorbing some of the infrared radiation emitted from the Earth.
- Fall '08
- CO2, Correct Answer, Greenhouse gas, Coal, Points Earned