Cumulative Exam — Cumulative exam Answers

Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem.

Which of the following statements about mining is true?a.Mining has no long-term effects on the Earth.b.Mining is unimportant to the economy.c.Mining has no ecological impact.d.Mining allows useful minerals to be extracted from the Earth.

Pollution in the _______ will have the greatest effect on human health.a.troposphereb.stratospherec.mesosphered.thermosphere

Human impact on one system leads to changes in more of Earth’s systems.

Soil is a mixture of _______.a.solidsb.solids, liquids, and gasesc.solids and liquidsd.solids and gases

Organisms that live in freshwater and marine biomes have developed unique adaptations that aid in their survival. Which of the following adaptations does not help an animal move through the water? a. streamlined body b. thick layer of blubber c. flippers and flattened tails d. smooth, almost furless body Please select the best answer from the choices provided

Which of the following factors renders a species more susceptible to disease and infertility?a.large genetic diversityb.inbreedingc.crossbreedingd.recessive traits

If a population of medium sized rodents is placed under a selective pressure that yields both very large and very small individuals it was most likely _______.a.a stabilizing selectionb.a disruptive selectionc.a directional selectiond.not a natural selection event

Which of the following is an aspect of the elastic rebound theory?a.Energy built up when plates try to get past each other is released when plates break free.b.Fault zones are often located near major population centers.c.Earthquakes occurring along subduction zones cause tsunamis.d.None of the above are aspects of the elastic rebound theory.

Which of the following statements about change in ecosystems is true?a.Ecosystems experience change through human activity only.b.Ecosystems experience change through natural events only.c.Ecosystems experience no change.d.Ecosystems experience change through human activity and natural events.

Which of the following is true about ice ages?a.forests are plentiful and commonb.biodiversity is reducedc.ecosystems are createdd.glaciers recede

What environmental factor does the pyramid of energy incorporate that prevents it from inverting?a.population sizeb.species turnover ratec.biomass at each trophic leveld.level of consumption

Fluctuations in the phosphorus cycle in aquatic ecosystems _______.a.can lead to changes in the growth rates of aquatic populationsb.are never caused by human impact on the environmentc.lead to a decrease in the amount of phosphorus found in sedimentd.never occur naturally

Changes to the global climate could include _______.a.changes to temperatureb.changes to pressurec.changes to precipitationd.all of the above

Soil composition and horizons vary depending on climate.

Matter is moved through the Earth by the interaction of Earth’s systems.

Volcanoes, tsunamis, and earthquakes occur as a result of continental shifting.

Herbivores typically have monocular vision to allow them a wider range of vision, which helps them elude predators. What type of adaptation is this?a.Behaviorb.Physiologicalc.Biochemicald.Ecological

What happens to water in the atmosphere as it rises?a.It evaporates.b.It condenses and forms clouds.c.It combines with other gases in the air.d.It is used up.

Which of the following would not be considered a point source pollution contributor?a.an animal feedlotb.cattle on rangelandc.a paper milld.a slaughterhouse