Title: What type of lake has nutrient-poor water, a small amount of organic matter, and low productivity? Post by: caddy85r on Nov 16, 2012 Question 1 of 30 3.33/ 3.33 Points
What type of lake has nutrient-poor water, a small amount of organic matter, and low productivity? A. A bathypelagic lake B. An epipelagic lake C. A eutrophic lake D. An oligotrophic lake E. A mesopelagic lake Answer Key: D Feedback: Good job! Question 2 of 30 3.33/ 3.33 Points An African tropical grassland that varies cool, dry seasons with hot, rainy seasons is the: A. Taiga B. Tundra C. Savanna D. Temperate deciduous forest E. Prairie Answer Key: C Feedback: Good job! Question 3 of 30 3.33/ 3.33 Points Which organisms provide most of the nutrient supply on the ocean and are at the bottom of the ocean food web? A. Seaweeds B. Small fishes C. Large fishes D. Phytoplankton E. Zooplankton Answer Key: D Feedback: Good job! Question 4 of 30 3.33/ 3.33 Points Which ecosystem is characterized by rich soils, insufficient rainfall for trees, and numerous large herbivores? A. Tundra B. Tropical rain forest C. Desert D. Temperate grasslands E. Taiga Answer Key: D Feedback: Good job! Question 5 of 30 0.0/ 3.33 Points The Earth is actually farther from the sun during the period when the Northern Hemisphere is having summer. What is the explanation? A. The Northern Hemisphere is warmed by sunlight reflected off the moon B. The tilt of the Earth causes warm air from the equator to move north C. The tilt of the Earth presents the Northern Hemisphere toward the sun D. The sun grows more powerful on a half-year cycle E. There is a six-month lag phase between sunlight being absorbed and lost Answer Key: C Feedback: The tilt of the Earth as it orbits the sun causes one pole or the other to be closer to the sun, and this accounts for the seasons that occur in all parts of the Earth, but not at the equator. Question 6 of 30 3.33/ 3.33 Points Of all the aquatic communities, _________ act as the best nutrient trap. A. Rivers B. Oceans C. Sandy beaches D. Estuaries E. Lakes Answer Key: D Feedback: Good job! Question 7 of 30 3.33/ 3.33 Points Topography has a very little effect on the determination of where ecosystems are found. True False Answer Key: False Feedback: Good job! Question 8 of 30 3.33/ 3.33 Points What type of forest is found in a broad belt in Northern Eurasia and North America, with cone-bearing trees? A. Temperate deciduous forest B. Taiga C. Tropical rain forest D. Desert E. Tundra Answer Key: B Feedback: Good job! Question 9 of 30 3.33/ 3.33 Points Which ecosystem with fertile soil has been mainly converted into agricultural farmlands for human use? A. Tundra B. Temperate grasslands C. Desert D. Tropical rain forest E. Taiga Answer Key: B Feedback: Good job! Question 10 of 30 3.33/ 3.33 Points The flat-topped acacia tree will be found in the ___________ ecosystem. A. Savanna grassland B. Tundra C. Prairie grassland D. Taiga E. Desert Answer Key: A Feedback: Good job! Part 2 of 6 - 26.64/ 33.3 Points Question 11 of 30 3.33/ 3.33 Points If you were studying a subdivision of conservation biology that seeks a scientific way to return ecosystems to their former state, you would be studying which of the following? A. Restoration ecology B. Landscape ecology C. Metapopulation ecology D. Biodiversity ecology E. Ecosystem ecology Answer Key: A Feedback: Good job! Question 12 of 30 3.33/ 3.33 Points A _____________ is one that lives in a favorable area, and its birthrate is most likely higher than its death rate. A. Sink population B. Source population C. Introduced population D. Metapopulation E. Keystone population Answer Key: B Feedback: Good job! Question 13 of 30 3.33/ 3.33 Points A species which is in peril of immediate extinction throughout all or most of its range is referred to as: A. A keystone species B. An introduced species C. An endangered species D. An extinct species E. A threatened species Answer Key: C Feedback: Good job! Question 14 of 30 3.33/ 3.33 Points Regions of the world that contain large concentrations of species are referred to as: A. Biodiversity landscapes B. Biodiversity hotspots C. Biodiversity ecosystems D. Biodiversity communities E. Biodiversity populations Answer Key: B Feedback: Good job! Question 15 of 30 0.0/ 3.33 Points So far, habitat loss has only occurred in the tropical regions. True False Answer Key: False Feedback: Locations of habitat loss are all over the world. Question 16 of 30 3.33/ 3.33 Points Which of the following is not a possible outcome of global climate change? A. Glaciers will melt B. Sea level will rise C. The ozone layer will become thinner D. Ocean temperatures will increase E. Ecosystems will be forced to move north Answer Key: C Feedback: Good job! Question 17 of 30 3.33/ 3.33 Points Most nonnative species have been introduced intentionally into a new environment and then spread out from its initial point of introduction. True False Answer Key: True Feedback: Good job! Question 18 of 30 3.33/ 3.33 Points Species that influence the viability of a community, although their numbers may not be exceedingly high, are referred to as: A. Keystone species B. Nonnative species C. Introduced species D. Alien species E. Pioneer species Answer Key: A Feedback: Good job! Question 19 of 30 3.33/ 3.33 Points The introduction of the zebra mussel from the Caspian Sea to the Great Lakes was: A. Accidental, from the ballast water from ships B. Intentional, to provide food for humans C. Accidental, it was brought over on the hulls of fishing ships D. Intentional, to provide food for an endangered fish E. Intentional, to help clean the Great Lakes Answer Key: A Feedback: Good job! Question 20 of 30 0.0/ 3.33 Points Which of the following ecosystems has the lowest biodiversity? 
 A. Tundra B. Temperate deciduous forests C. Taigas D. Tropical rain forests E. Tropical grasslands Answer Key: A Feedback: Understand where the least biodiversity is located on Earth Part 3 of 6 - 6.66/ 6.66 Points Question 21 of 30 3.33/ 3.33 Points In the lab activity, you can select different ecosystems to work with A. By typing the name on the ecosystem in the data table. B. From a specific list provided by the instructor and sent to you via email C. By accessing the field guide and clicking on the names of the ecosystem. D. From a dropdown button at the top of the screen. Answer Key: D Feedback: Good job! Question 22 of 30 3.33/ 3.33 Points What happened if an animal or plant was placed into a trophic level incorrectly? A. A voice would sound advising you to reconsider your choice B. When you hit the Check button the name of the organism would bounce back to the list on the left C. When you dropped the blue ball of the organism into the level it would not stick D. The image of the plant or animal would flash red once it was introduced into the trophic level Answer Key: B Feedback: Good job! Part 4 of 6 - 9.99/ 9.99 Points Question 23 of 30 3.33/ 3.33 Points Another name for autotrophs is: A. Decomposers B. Synthesizers C. Producers D. Composers Answer Key: C Feedback: Good job! Question 24 of 30 3.33/ 3.33 Points Based on the lab activity, which of the following statements is correct about the Freshwater Lake ecosystem? A. Decomposers are found primarily in the littoral zone B. The limnetic zone is dominated by plankton C. Plankton have long life span D. Most large predators, such as bass and catfish, occupy primarily the littoral zone Answer Key: B Feedback: Good job! Question 25 of 30 3.33/ 3.33 Points The order of trophic levels in an ecosystem is: A. Producers, first order heterotrophs, second order heterotrophs, third order heterotrophs B. Third order heterotrophs, producers, second order heterotrophs, first order heterotrophs C. First order heterotrophs, second order heterotrophs, third order heterotrophs, producers D. First order heterotrophs, producers, second order heterotrophs, third order heterotrophs Answer Key: A Feedback: Good job! Part 5 of 6 - 6.66/ 9.99 Points Question 26 of 30 3.33/ 3.33 Points In the simulation both the Antarctic Ocean Shore and Freshwater Lake ecosystems have one Third Order Heterotroph species listed. ___________ are found in the Antarctic Ocean Shore and ________ are in the Freshwater Lake ecosystem. A. Hawks, wolves B. Crayfish, minnows C. Owls, bass D. Orcas, herons Answer Key: D Feedback: Good job! Question 27 of 30 3.33/ 3.33 Points Which of the following is not a characteristic of a deciduous forest ecosystem? A. Diverse ecology B. Ground clear of cover C. Warm summers D. Abundant moisture Answer Key: B Feedback: Good job! Question 28 of 30 0.0/ 3.33 Points In the lab activity, the biomass of algae and phytoplankton A. Is not a very important ecological factor B. Does not accumulate because these organisms have short lifespan and are rapidly grazed C. Accumulates rapidly because these organisms grow relatively fast and have long lifespan D. Remains consistent and widely available throughout the year, regardless of seasonal changes in ocean currents Answer Key: B Feedback: Refer to the Field Guide for details. Part 6 of 6 - 6.67/ 6.66 Points Question 29 of 30 3.33/ 3.33 Points Evaluate the role of decomposers in an ecosystem: particularly, explain why they are critical to an ecosystem. They have 2 main functions; one they break down dead and organic material and then plants use the borken down inoganic molecules to complete their photosynthetic process Model Short Answer: Decomposers have two main functions in an ecosystem: they break down dead organic material and plants use the broken down inorganic molecules to complete the photosynthetic process. Question 30 of 30 3.33/ 3.33 Points Based on your lab activity, predict what would happen to a freshwater lake ecosystem’s food web if an invasive second order heterotrophic species was introduced. If a invasive second order was introduced then they would run short on first order and producers Model Short Answer: Answers will vary. Some possible answers: a. Reduction in the fish, frog, and crayfish populations, because of additional competition on limited resources. b. Increased selection on the first order heterotrophy populations, because of additional Title: Re: What type of lake has nutrient-poor water, a small amount of organic matter, and low ... Post by: cloveb on Oct 20, 2022 thanks :)
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