4. All of the following organisms in a marine food web, close to the Arctic Circle, would properly beclassified as heterotrophic animals, with the exception of:A. the harp seal (a quaternary consumer species)B. the polar bear (a quinary consumer species)C. the squid (a secondary consumer species)D. the flatfish (a tertiary consumer species)E. phytoplankton (a producer species)

Food web is linkage of multiple food chain involving various trophic levels in which producers…

Answered: 4. All of the following organisms in a…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter54: Ecosystems And Global Change

Section: Chapter Questions

Problem 1TYK

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7. Describe the variety of phytoplankton and zooplankton in the sublittoral study site (Site C). How can you differentiate them? 8. Draw a diagram of the food chain which you think exist in the shore ecosystem that studied. What will happen if there is an extinction of one of the species especially you the ones at the top of the chain? 9. Based on all the aspects that you have observed, is the shore that you studied is polluted? If yes, what are the steps that could be taken? Give your comments.
3. Which trophic level converts energy into biomass with the highest food-chain efficiency? A. the fifth trophic level (quaternary consumers) B. the fourth trophic level (tertiary consumers) C. the third trophic level (secondary consumers) D. the second trophic level (primary consumers) E. the first trophic level (producers)
2. Simple food chains seldom exist in the ocean. The complex feeding relationships within marine ecosystems are better described as food webs. Whether considering a food chain or a marine food web, the lowest trophic level is occupied by_ a. autotrophs b. carnivores c. herbivores d. decomposers
28. Which of the following is an accurate statement about ecosystems? a. Energy is recycled through the trophic structure. b. Energy is usually captured from sunlight by primary producers, passed to secondary producers in the form of organic compounds, & lost to detritivores as heat. c. Chemicals are recycled between the biotic and abiotic sectors, whereas energy makes a one way trip through the food web and is eventually dissipated as heat. d. There is a continuous process by which energy is lost as heat, and chemical elements leave the ecosystem through runoff. e. A food web shows that all trophic levels may feed off each other.
6.Which of the following is a true statement? a. There are always more heterotrophs than autotrophs in an ecosystem b. Only 10% of the energy is transferred from one trophic level to the next -- because of this energy loss, there are always more autotrophs c. In numbers pyramids, there are more autotrophs but no in biomass pyramids d. The number of species increases as the trophic level increases answer explain
4. All of the following represent problems with international commons, with the exception of: A. release of carbon dioxide into the atmosphere by burning coal, oil, and natural gas B. depletion of ocean fisheries outside of nationally-recognized coastal boundaries C. extraction of fossil fuel reserves not claimed by sovereign nations in Antarctica D. exploitation of rare earth mineral deposits on the floor of the Pacific Ocean E. digging for clams in marine estuaries along the Atlantic coast of Maine
2. The trophic relationships in real biological communities are much more complex than a simple food chain. These more complex trophic relationships are shown in a food web. This diagram shows a small part of a food web. Notice that the food web contains multiple food chains. A. Circle the organisms in one of the food chains in this food web. B. Label the producer in the food chain you circled. mountain lion C. Explain why the hawk in this food web is a trophic omnivore, even though it does not eat both plants and animals. deer atrod ugog 10ods nous W snake rabbit trees hawk mouse- grasses frog Z cricket bas to AnidT A 46
9. According to the principle of competitive exclusion, what outcome is expected when two species with identical niches compete for a limiting resources? (A) one species will be extirpated, (B) both species will coexist indefinitely, (C) both species will go extinct, (D) the resource will no longer be limiting, (E) the two species will form a mutualism.
1.Modern agroecosystems differ from natural ecosystems in all of the following ways except: A. they attempt to suppress ecological succession by allowing only pioneer species to thrive B. they tend to raise crops in multiculture rather than monoculture (a single species) C. they tend to plant crops in neat, orderly rows rather than complex spatial arrangements D. they make the food chain less complex, so that lower species diversity results E. they (the artificial ecosystems) tend to be less complex than the natural ecosystems
1. Define biotic and abiotic factors of the environment. Give an example of each. 2. How do ecologists define the term ecosystem? 3. State the competitive exclusion principle. 4. Identify three different types of consumers. Name an example of each type. 5. Describe the role of decomposers in food webs. 6. What is a biogeochemical cycle? Name an example.
11. The following is a list of abiotic factors that would have a micro-effect on a tidal pool (rocky pockets of water where the ocean meets the land). Select the one that would have larger, long-term effects if changed.(1 point) rising water depth water chemistry (pH, pollution, etc.) weather (wind, rain, etc.) temperature 9. A graph of the total number of species found in an area against the percentage of land under protection would show a/an(1 point) exponential correlation. lack of correlation. positive correlation. negative correlation.
1. Which statement best describes some organisms in the food web shown below. Raccoons - Ducks Fish + Minnows Aquatic crustaceans Algae and floating plants Minnows and fish are primary consumers. a. b. Algae and floating plants are decomposers C. Aquatic crustaceans are omnivores d. Raccoons, fish, and ducks are secondary consumers Correct Answer Justify with Biological Reasoning

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