Unit 4 Test Review
Quiz by Amanda Wood
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13 questions
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- Q1Depletion of non-renewable resources such as oil, gas, coal, minerals, or useable water is not likely to impact ―world food productionglobal economic growthdemand for scarce resourcesover population of countries30s
- Q2Kudzu, a fast-growing Asian vine, was imported to the U.S. in the 1930s to control erosion. It has smothered millions of acres of forests since then. In fact, most of the species on the U.S. endangered list are there, in part, because of invasive species like kudzu and its effects on the environment.Kudzu is causing a change in the biodiversity of ecosystemsKudzu has been in the U.S. long enough to become a native speciesKudzu does not provide food and shelter for animals native to the forest biomeBringing in another foreign species that eats kudzu will solve the problem30s
- Q3Why are native species often threatened by exotic species introduced by human actions?Non-native species have no natural predators in their new ecosystem. They did not evolve within the ecosystem and may compete with, or prey on, native species.Native species tend to be less genetically diverse than non-native species. They cannot evolve in cases of habitat loss.Non-native species are always better at adapting to new climates than the native species30s
- Q4Feral pigs are an invasive species commonly found in the Pineywoods of East Texas. Areas where feral pigs are found often have damaged farmlands, grass, and tree roots. When the pigs live close to water sources, their presence erodes the soil. This disrupts the native vegetation and makes those plants vulnerable to invasive plant species. There are no known natural predators to feral pigs. How will the removal of the feral pig affect existing population in that ecosystem?Removing the pigs will cause the native vegetation to become quickly overgrown because the plants will no longer be the prey of the pigs.Removing the pigs will cause an increase in native plant populations over generations because the pigs will no longer damage the land.Removing the pigs will not affect the ecosystem because the pigs have no natural predators that will be affected by their removal.Removing the pigs will cause an increase in invasive plant populations because the pigs were the only organism eating invasive plants.30s
- Q5Mass extermination efforts in the first half of the 20th century decimated the gray wolf population. Which of the following was not an effect on the other existing populations in the Western United States?Insect populations, such as mosquitoes, increased.Willows and other riparian plants were wiped outThe elk populations grew exponentiallyFish populations in the streams increased30s
- Q6Certain natural selection pressures can cause genetic diversity within a species to decrease. What is a possible effect on a population that has had a decrease in the genetic diversity within the population?The population will be less likely to find sources of food because all of the individuals in the population will be competing for the same types of prey.The population will have a greater chance of surviving when changes in the ecosystem occur because only those with advantages genes have survivedThe population will be more likely to adapt to changes in the ecosystem over time because the genes that remain in the population are more likely to mutate.The population will be at risk if a new disease is introduced because a greater percentage of the population has the same traits that make them vulnerable to the disease30s
- Q7Populations that have reached carrying capacity usually have —decreasing population sizean S-shaped growth curvea J-shaped growth curveno growth30s
- Q8Which statement best explains why r-selected species rarely reach carrying capacity?The small body size of r-selected species means that they will not use as many resources causing the limitation of the resources to be rare.Local weather has a greater impact on r-selected species which causes large fluctuations in their population size.Their life span is so short that there is not enough time for limited resources to impact the population sizeThe number of offspring generated by r-selected species is so low that resources are rarely limited for the population30s
- Q9Depletion of nonrenewable resources may be the most pressing problem of the next 100 years. Which of the following events often results in the increased depletion of nonrenewable resources?Reforestation of land cleared for agricultureHuman population growthRecycling of technological products, such as cell phones and computersEnvironmental protection legislation30s
- Q10Depletion of non-renewable resources such as oil, gas, coal, minerals, or useable water is not likely to impactworld food productionover population of countriesdemand for scarce resourcesglobal economic growth30s
- Q11How are protected lands threatened by non-renewable resource depletion?Revenue for non-renewable resource production from protected lands is vital to support land managementProtected lands require a lot of energy to maintain, so increased energy costs will affect how many areas can be protectedOrganisms in protected areas depend on natural gas resources for survival, so as these resources become scarce, the populations decrease.As oil resources become scarce, exploration of protected lands for these resources jeopardizes the fragile ecosystems30s
- Q12Which of the following is a density-independent limiting factor that affects population growth?Limited food supplyInfectious diseaseNumber of nesting siteForest fire30s
- Q13About 3 million Brazilian free-tailed bats live near Fredericksburg, Texas in an abandoned railroad tunnel. Eighty percent of the free-tail's diet includes pests such as the cutworm, corn borner, and webworm moths. Each can eat its weight in insects nightly, and the whole colony may devour over 25 tons of moths per night. The bats return to the tunnel between midnight and daybreak, having traveled an average 25 to 30 miles to forage. As the population of bats increases, it is expected that the crop production in nearby areas will -show a minimal responseremain constantsteadily increasebe cut in half30s