CONCEPTS BIOL-1309-01_BIOLOGICAL II(2011/SP)_11:00AM_11:50AM_MWF_LHSB_1.102 (2011SP_BIOL_1309_01) > TAKE ASSESSMENT: PRACTICE TEST #02
Take Assessment: Practice Test #02
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Question Completion Status: 1 21 2 22 3 23 4 24 5 25 4 points The axis of the Earth is tilted away from the sun in ________ and toward the sun in ________. Save 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Question 1
summer; winter fall; spring spring; fall winter; summer Question 2 What is the best way to use antibiotics to maintain your health? 4 points Save
Use antibiotics only to treat serious bacterial infections. When using antibiotics, continue treatment for the recommended period of time, even if the infection seems to have been cured before the course of treatment is completed. Use antibiotics only to treat serious infections, and minimize use by stopping treatment as soon as signs of the infection disappear. Never use antibiotics unless gravely ill. The risks of using antibiotics in situations other than life-or-death are too great. Use antibiotics routinely. It is best to attempt to kill as many bacteria as possible to maintain good health. Question 3 Which activity could best be considered an example of an ecological study? 4 points Save
developing a medication to treat kidney failure in cats comparing the effects of varying water temperature on fish egg development measuring monthly ocean temperature changes calculating the age of a giant redwood tree by counting its annual rings Question 4 4 points Global climate change is likely to increase the rate of extinction worldwide. The pollutant most implicated in this problem is Save
chloroflurocarbons. carbon dioxide. nitrous oxides. sulfur dioxides. Both B and D are correct. Question 5 4 points When a patch of land is cleared in a tropical rain forest, the vegetation is often burned to enrich the soil with nutrients from the burned plant material. This Save
"swidden agriculture"
works well because so many nutrients are trapped in tropical plants. works for a few years but the soil is soon depleted of nutrients. helps long-term sustainable agriculture. is not necessary because tropical soils are filled with nutrients. Question 6 4 points During the 1980s, wolves were reintroduced to Yellowstone National Park after decades of absence due to attempted extermination in the early part of the 20th century. Within twenty years, not only had the wolf population increased, but there was also a dramatic increase in other species such as aspen, cottonwood, and willow trees, as well as beaver, warblers, insects, and fish. These changes in Yellowstone Park are examples of how important a(n) ________ can be to an ecosystem. Save
parasite keystone species competitor herbivore Question 7 4 points Although most biologists believe that many species are becoming extinct each year because of the activities of humans, relatively few species actually appear on compiled lists of extinct species. What is one reason why so few species are listed as extinct? Save
Many species are unknown to science, and probably go extinct before they have been described. Many species are not listed because they are not considered important. There really aren't that many species that have become extinct. Only extinctions that are naturally caused are listed. Question 8 4 points Save
The actual carrying capacity of our planet may be lower than initially calculated because
net primary production has been decreasing. the average American uses more resources than someone from another country. modern food production relies on non-renewable resources. The carrying capacity is fine because we use only 1/3 of the total land NPP. Question 9 An action that you can take to reduce habitat destruction would be 4 points Save
buy bamboo flooring. recycle newspaper. reduce your consumption of meat. All of the above. Question 10 Burning fossil fuels can result in 4 points Save
a decrease in acid rain. an increase in carbon dioxide. an increase in mercury levels. a decrease in ground-level ozone. Both B and C. Both A and D. Question 11 4 points Save
Extracts of the rosy Catharus periwinkle, roseus, have provided medicine with vincristine and vinblastine, drugs now available for treating cancer. The ability to find this species of plant and discover these drugs is a strong argument for
overexploitation. preserving biodiversity. supporting pharmaceutical industries. genetic engineering. Question 12 4 points One problem associated with using NPP to calculate the carrying capacity for humans is that Save
it fails to take into account our need for other resources such as water, clean air, and fuel. NPP is not important when considering the human population. it overestimates the effects of humans on the ecosystem. humans grow their own food, which is not a part of the NPP. Question 13 4 points As the Industrial Revolution took place, there was a decrease in infant mortality resulting in Save
an increase in the population growth rate. a decrease in the population growth rate. a stabilization of the population growth rate. Question 14 4 points When all living organisms are included, the ________ biome contains about 70% of the biomass found on Earth's land surface. Save
tundra
savanna salt marsh forest Question 15 4 points The current rate of extinction is estimated to be how many times greater than the calculated background rate? Save
100 times greater 2 times greater 50 times greater 10 times greater Question 16 4 points In a particular county there are 30 births and 20 deaths for every 1000 residents. What is the annual growth rate of this population? Save
1.0% 10% 3.0% 30% Question 17 4 points A woman is more susceptible to vaginal yeast infections when taking antibiotics because Save
her immune system is already not functioning well due to previous infections. the normal bacteria in the vagina are also killed by the antibiotic and
cannot perform the function of competitive exclusion of the yeast. the antibiotic serves as nutrition for the infectious yeast. None of the above are correct because there is no connection between antibiotics and vaginal yeast infections. Question 18 When a population grows larger than the carrying capacity 4 points Save
birth rates plummet. food becomes scarce. death rates rise. All of the above. Question 19 4 points If everyone on the planet used resources and lived the average lifestyle of an American Save
we would need multiple Earths for this to be possible. the Earth would have the carrying capacity to sustain the human population. the population growth rate would immediately decrease. Most people on Earth live a lifestyle similar to Americans already. Question 20 The pressure to clear more land for agriculture can be reduced by 4 points Save
showing farmers in developing countries how to efficiently clear their land. supporting birth control measures worldwide. farming more animals per acre.
buying products from developing countries to support their economy. Question 21 4 points As the size of a population approaches the carrying capacity of its environment, Save
a graph of population growth resembles an "S". the population stabilizes at its maximum size. birth and death rates become equal. the growth rate declines to zero. All of the above. Question 22 Broadleaf deciduous trees of temperate forests 4 points Save
reabsorb chlorophyll, resulting in the colorful autumn pigments becoming visible. can grow more quickly than narrow-leaved trees during summer months. drop their leaves each fall as daylight hours decrease. All of the above. Question 23 The fragrant oils found in herbs like rosemary and thyme 4 points Save
encourage humans to pick them and spread their seeds. discourage predation. protect the plant from fire. help fuel fires to which they are adapted. Question 24 A food chain in the ocean from the base up would be 4 points Save
albatross, cod, zooplankton, phytoplankton. zooplankton, phytoplankton, tuna, cod. shark, cod, phytoplankton, zooplankton. phytoplankton, zooplankton, sand lance, humpback. Question 25 4 points The current rapid loss of species is sometimes called the "sixth mass extinction." This increase in extinction rate beyond background extinction is thought to be due to Save
continental drift. changes in the number of solar flares observed recently. a recent increase in earthquakes worldwide. human population growth and the resulting habitat changes worldwide. Both A and B are correct.
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