Skip to main content
Chemistry LibreTexts

14.04 Week 14 Quiz

  • Page ID
  • cc_profilecc.exam.v0p1qmd_assessmenttypeExaminationqmd_scoretypePercentagecc_maxattempts1
    cc_profilecc.multiple_choice.v0p1Which phrase best describes the focus of ecology?individual organismsindividual cellsinteractions among organismsinteractions among cells3100cc_profilecc.multiple_choice.v0p1What is the term for a group of different species in a given area?populationecosystemcommunitybiome7100cc_profilecc.multiple_choice.v0p1Which level of organization in ecology is a major regional or global community of organisms?an ecosystempopulationcommunitybiome12100cc_profilecc.multiple_choice.v0p1Which of the following is an example of a biotic factor in an ecosystem?sunlightstreamtreerock15100cc_profilecc.multiple_choice.v0p1Wind is considered to be an abiotic factor because itis not related to a nonliving in not in any ecosystem.18100cc_profilecc.multiple_choice.v0p1A keystone species is a species thatgoes unnoticed if its numbers decrease.alters an area by building bridges and dams.leads to a decrease in an area's biodiversity.has an unusually large impact on its ecosystem.24100cc_profilecc.multiple_choice.v0p1Beavers are sometimes trapped for their fur. What could be one effect of increased trapping of beavers in an area?Biodiversity among the area's fish would increase.The number of herons and kingfishers would decrease.There would be more nesting areas for waterfowl.More trees would be cut down.26100cc_profilecc.multiple_choice.v0p1An organism that makes its own food is called aconsumer.producer.heterotroph.chloroplast.30100cc_profilecc.multiple_choice.v0p1A moose is considered to be a consumer because itgets energy by eating other resources.makes its own food.forms carbohydrates using chemicals.uses sunlight for energy.33100cc_profilecc.multiple_choice.v0p1The basis for the energy in an ecosystem is provided byconsumers.heterotrophs.chemosynthesis.producers.40100cc_profilecc.multiple_choice.v0p1Most producers get energy from the Sun using the process ofrespiration.consumption.photosynthesis.chemosynthesis.43100cc_profilecc.multiple_choice.v0p1A model that shows a single sequence of feeding relationships is called atrophic web.feeding chain.46100cc_profilecc.multiple_choice.v0p1Decomposers are important to ecosystems because theyreturn vital nutrients to the environment.are producers.capture energy from the Sun.can be omnivores.49100cc_profilecc.multiple_choice.v0p1A food chain contains oak trees (producer), mice (herbivore), black rat snakes (carnivore), and bald eagles (carnivore). How many trophic levels does this food chain have?onetwothreefour56100cc_profilecc.multiple_choice.v0p1Food webs are models that showone sequence of producers and consumers.networks of feeding relationships.stored energy in food chains.only primary consumers in an ecosystem.58100cc_profilecc.multiple_choice.v0p1The water cycle, in which water moves from the atmosphere, to the surface, below ground, and back, is also called thebiogeochemical cycle.oxygen cycle.hydrologic cycle.nitrogen cycle.63100cc_profilecc.multiple_choice.v0p1Which two biogeochemical cycles depend directly on photosynthesis?the hydrologic cycle and the oxygen cyclethe carbon cycle and the phosphorus cyclethe nitrogen cycle and the phosphorus cyclethe oxygen cycle and the carbon cycle68100cc_profilecc.multiple_choice.v0p1Where does most of the phosphorus cycle take place?in the atmosphereat and below ground levelon fungi near plant rootsclose to rocky terrain70100cc_profilecc.multiple_choice.v0p1Each level in a food chain contains less energy than the one below it because some energy isadded to the system.lost as heat.consumed by carnivores.incorporated into biomass.74100cc_profilecc.multiple_choice.v0p1A diagram that shows how available energy is distributed among trophic levels in an ecosystem is called a(n)food pyramid.pyramid of pyramid.80100cc_profilecc.essay.v0p1qmd_computerscoredNo<p>How might an oil spill in the ocean affect an aquatic food web? What might happen to the food web on land located near the spill? Explain your answers</p>100