29) Which of the following ecosystems would likely have the largest net primary productivity per hectare and why? C) the increase in the average temperature of the whole planet B) Predators have relatively large population sizes. At the other extreme, areas that are cold much of the time, such as the Arctic, are unable to support much plant life. Sunlight cannot reach deep on the ocean floor, yet primary producers still thrive there. A) China c. Chemosynthetic producers. 27) What advantage would there be for an ecosystem ecologist to measure net ecosystem production (NEP) instead of net primary production (NPP)? 31) Which one of the following correctly ranks these organisms in order from lowest to highest percent in production efficiency? IV. Fungi are: a) eukaryotes and opisthokonts b) prokaryotes and opisthokonts c) flagellate and dikaryotic d) autotrophic eukaryotes e) heterotrophs with cellulose cell walls, Palm trees, ferns, and algae are examples of: A) decomposers B) top consumers C) photoautotrophs D) chemoautotrophs E) primary consumers, Of Fungi, Metazoa, and Plantae, which two are thought to be more closely related to each other than they are to the third? About how much of the chemical energy fixed by photosynthesis of the grass (100 percent) is available to the hawk? The primary producers include plants, lichens, moss, bacteria and algae. D) not affected by any form of cutting, (B) typically 10 times higher in a clear-cut watershed, Based on the experiment in the accompanying figure, which of the following are plausible reasons for the result? Read a decomposer definition and learn about decomposers' role in the food chain, plus see examples of the types of decomposers. Some may discolor the water, have a foul odor or make the water or fish taste bad, but not be toxic. ; For example, In terrestrial ecosystems, producers are the green plants, phototrophic bacteria, algae etc. 49) Which of the following statements is correct about biogeochemical cycling? 33) Use the following figure to answer the question. 17) Why is terrestrial productivity higher in equatorial climates? E) soil, A 3-hectare lake in the American Midwest suddenly has succumbed to an algal bloom. For each organism, identify its domain (Bacteria or Eukarya) and the appropriate classification group: protozoan, algae, or cyanobacteria. a. producer b. primary consumer c. secondary consumer d. tertiary consumer e. decomposer ____ 30. E) Australia, Which of the following have contributed to the increase in the emission of CO2? 32) Owls eat rats, mice, shrews, and small birds. Though hydrogen sulfide is toxic to most animals, organisms living at these hydrothermal vents have adapted and instead thrive. E) E, The feeding relationships among the species in a community determine the community's ________. a. more similar questions (a) Amoebae (b) Kinetoplastid (c) Oomycete (d) Ciliates (e) Diatom. Which of the following is most correct regarding primary producers? phosphorus. . increases in per capita fossil-fuel use mainly primary consumers are herbivores. Protists are all alike in that all are: A) autotrophic. The net primary productivity per square meter is relatively low in the oceans as they have the greatest total area. B) archaea. a. Protista b. a. plants b. animals c. All of the Above d. protist. a) Yeasts b) Sponges c) Sporozoans d) Fishes e) Diatoms. with economic value? It also provide almost all earth's oxygen and supply food for marine ecosystems. a. algae b. yeast c. amoeba d. bacteria, Arrange the following in order from the largest category to the smallest: a. Paramecium b. Protista c. Ciliates d. Protozoa e. Life f. Eukarya, What kingdom does amoeba belong to? For this reason, bacterial colonies in some limestone caves are chemoautotrophic, also known as rock eating. These bacteria, like those in the ocean depths, get their necessary nourishment from the nitrogen, sulfur or iron compounds found in or on the surface of rocks that have been carried there by water seeping through the porous surface. The primary sources of greenhouse gas emissions in the United States are: Transportation (27% of 2020 greenhouse gas emissions) - The transportation sector generates the largest share of greenhouse gas emissions. Select all of the following that describe the primary production of an ecosystem. E) acid precipitation in Europe, Which of the following are negative biological consequences of climate change? Phytoplankton are affected by environmental factors such as temperature and sunlight as well as the availability of nutrients and the presence of herbivorous predators. A longtime student of the life sciences, she served as a leader for Girl Scouts and 4H, sharing her interests by teaching children and teens about natural and environmental science and animal anatomy. B) nitrite ions in the soil Is a mushroom a decomposer? In other words, all animals are dependent, either directly or indirectly on the food materials stored in plants. A) atmosphere 61) Which of the following organisms is incorrectly paired with its trophic level? You own 300 acres of patchy temperate forest. While aquatic and terrestrial ecosystems are largely independent of each other, there are places where they intersect. A) rate of decomposition of detritus The total biomass of an ecosystem would be most increased by which of the following? D) nitrogen fixation by bacteria, Consider the global nitrogen cycle depicted in the accompanying figure. All of the above are eukaryotic. 4) Use the following figure to answer the question. Nitrogen is the limiting nutrient when considering global primary production. For example, if 1,000 kilocalories of energy are present at the primary producer level, one-tenth of this energy (about 100 kilocalories) is passed to the primary consumers in the next level. D) biomagnification of toxic materials limits the secondary consumers and top carnivores Net primary production 2. 40) Consider the food chain of grass grasshopper mouse snake hawk. Along with decomposers, they make up the base of a food web and together their populations number more than any other part of the web. D) 3C D. decomposers. C) convert organic materials from all trophic levels to inorganic compounds usable by primary producers C) internal nitrogen cycling in the oceans C) protists. Producer Definition. B) increased extinction rates of species in the food chain They use the chemical energy found in the minerals of the hot spring to create hydrogen sulfide. After a rain, algae and lichens become photosynthetically active and (due to their ability to reproduce rapidly) provide a food source for higher-level organisms before the desert heat causes the water to evaporate. Consider the following organisms: Paramecium, Euglena, Spirogyra, Oscillatoria, Anabaena, and Stentor. many animals prefer eating plants to eating meat. A) Top-level predators are destined to have small populations that are sparsely distributed. D) the changes in ocean temperatures as a result of increased global carbon emissions C) species richness Which of the following is most correct regarding primary producers? Important biogeochemical cycles in ecosystems include all of the following except the ________ cycle. Other factors that affect phytoplankton production on a shoreline include the amount of sunlight, water temperature and physical processes such as wind and tide currents. Fungi (like mushrooms) are decomposers that decompose organic matter and consume that as their source of energy. II. C) Seal meat probably contains the lowest concentrations of fat-soluble toxins. A) 7C (D) The answer is most likely a combination of the other responses. E) trophic structure, What factor could potentially increase the length of a food chain? Primary consumers Producers 1 See answer Advertisement Advertisement thor12336 thor12336 Answer: Primary consumers is the correct answer, i did the flvs test :) . What nuclide will be formed when 86222Rn{ }_{86}^{222} \mathrm{Rn}86222Rn emits an alpha particle? All of the following are ways fungi are similar to animals except A) fungi store extra food in the form of glycogen. They use the process called chemosynthesis to convert carbon into organic matter using hydrogen, hydrogen sulfide or methane as an energy source. C) algal beds and reefs a. bacteria b. archaea c. protists d. fungi e. plants f. animals. a. secondary consumers b. tertiary consumers c. primary producers d. primary consumers e. secondary producer; Humans are _____. b. Heterotrophic. B) open ocean Which of the following is an example of a group of prokaryotic organisms? B) animals. At the top level are secondary consumers the carnivores and omnivores who eat the primary consumers. III. Which of the following is primarily responsible for limiting the number of trophic levels in most ecosystems? Carnivores eat only animals, but omnivores eat . E) 60 percent. a. Protista b. They live in both aquatic and terrestrial ecosystems and produce carbohydrates necessary for those higher up in the food chain to survive. Which of the following factors account for the inefficiency of the rate of photosynthesis? Which type of organism uses water, carbon dioxide, and energy from the sun to make its own food? I. industrially produced fertilizers Explain. Give an ex C) uric acid from animal excretions A) tropical wet forest plus the ocean neritic zone B) Populations of top-level predators are generally smaller than populations of primary consumers. D) global warming Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. B. Prokaryotes such as E. coli. D) only II, III, and IV A. Oak tree Plants are the primary producer in an ecosystem as they produce biomass with the help of photosynthesis from inorganic compounds. Eating meat is an inefficient way to utilize autotrophic productivity. I. changes in geographic ranges E) Food-chain length is ultimately determined by the photosynthetic efficiency of producers. Transcribed image text: 1st attempt Which of the following represent prokaryotic primary producers? A. mosses and liverworts. You discover a nucleated, unicellular organism that is photosynthetic but can also eat other organisms. D) D C) only III zooxanthellae The genes may be on different chromosomes. A) the changes in precipitation patterns that result from global warming ; The amount of energy observed at a trophic level decreases when moving through an ecosystem. Herbivores are group of organisms that feeds on plants alone. See Section 2.1 and Figure 3.01. 20) Use the following figure to answer the question. D) wetlands, Which category in the figure makes available the highest productivity per square meter? What is the limiting portion of the cycle for plants? chemosynthetic bacteria. A) recycle chemical elements directly back to primary consumers Since they are small in size and can be susceptible to changing environmental conditions, ecosystems with more diverse populations of primary producers tend to thrive more than those with homogeneous populations. Which of the following is most correct regarding the activity of detritivores? Why are food chains relatively short? D) species-area curve What is the reason for this seeming contradiction? B) introduction of nonnative tertiary consumer fish The none of the above is what this is. A. Archaea B. Eukarya C. Fungi D. Protists, The last common ancestor of all animals was probably a/n _____________________. 38) Which trophic level is most vulnerable to extinction? Amount of energy available to primary consumers Which of the following is a consequence of biomagnification? C) The biomass of producers in an ecosystem is generally higher than the biomass of primary consumers. Primary producers are a basic part of an ecosystem. About half of all photosynthesis happens in the oceans. In turn, zooplankton, which include copepods, jellyfish and fish at the larval stage, provide food for filter-feeding organisms such as bivalves and sponges as well as amphipods, other fish larvae and small fish. D) usually greater than production efficiencies E) top carnivores and secondary consumers have a more general diet than primary producers, (B) at each step, energy is lost from the system. |--|--|--| Finally, answer the five questions following the food web diagram. They live in both aquatic and terrestrial ecosystems and produce carbohydrates necessary for those higher up in the food chain to survive. 59) Which of the following would be considered an example of bioremediation? a. In freshwater areas and shallow saltwater areas, producers include not only phytoplankton such as green algae, but also aquatic plants such as sea grasses and seaweed or larger rooted plants that grow on the surface of water such as cattails and provide not only food but also shelter for larger aquatic life. c. They are both prokaryotic. *A Private Investor is a recipient of the information who meets all of the conditions set out below, the recipient: Obtains access to the information in a personal capacity; (C) ones that use nitrogen-containing compounds as an electron acceptor. D) It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics. D) wetlands, Considering its total area covered, which ecosystem type represented in the figure has a very low level of economic impact on Earth's ecosystem, assuming that NPP is positively correlated a primary consumers. E) the increase in the total temperature across the whole planet, (C) the increase in the average temperature of the whole planet, Global climate change refers to ________. Which of the following statements regarding this flow of energy is true? C) I, II, and III B) ecological niche After looking at the accompanying figure, what can be said about productivity in this ecosystem? Organisms in all trophic levels above the primary producers are called. They are organisms that feed on primary consumers for nutrients and energy. They can be thought of as the first and most important step in the food chain. Analysts at Deutsche Bank raised their target price on Associated British Foods from 2,180.0p to 2,300.0p on Tuesday, stating its Primark unit had driven "another upgrade". So-called brown tides, while not toxic, can cover large areas of the waters surface, preventing sunlight from reaching below and subsequently killing off those plants and the organisms that depend on them for life. Plantae B.) (a) Archaea (b) Plantae (c) Fungi (d) Protista (e) Animalia. Secondary consumers Decomposers Primary consumers Producer Get the answers you need, now! Chemical elements are repeatedly used, but energy passes through and between ecosystems. III. B) rock, sand, and ice A) China C. ferns and hornworts. E) It is recycled by decomposers to smaller and smaller forms until it finally breaks down to form soil. C) Japan 3. \\ c. Protista. Unicellular autotrophs may be found in the kingdom _______. A) Primary producers occupy the trophic level that directly feeds all autotrophs.B) Heterotrophs are able to thrive in an ecosystem without primary producers. sediments and sedimentary rocks 900 seconds. Algal blooms can occur in almost any body of water. E) only I and II, Nitrogen is available to plants mostly in the form of ________. (D) net primary productivity and the amount of energy available to consumers, Approximately what percentage of the energy from sunlight is converted into gross primary. Organisms at the top of the chain eventually die and are then consumed by decomposers, which fix the nitrogen levels and provide the organic material necessary for the next generation of primary producers. Her work has also appeared on LetsGetOutside.us and Happy Science Mom. Red-tailed Hawks prey on mice and prairie kingsnakes . Plants are called primary producers because they produce the material and store the energy at the bottom of the food chain. Which organisms form the kingdom Plantae? 1) Autotrophic 2) Eukaryotic 3) Heterotrophic 4) Symbiosis 5) Decomposers. (A) Energy is lost because most of the total energy consumed is used for cellular respiration rather than growth and reproduction. D) Only a small portion of the energy captured by producers is transferred to consumers. A) I C) as matter passes through ecosystems, some of it is lost to the environment plant and animal biomass 68) If you applied a fungicide to a cornfield, what would you expect to happen to the rate of decomposition and net ecosystem production (NEP)? D) Obtaining a bachelor's degree. A) biome producers, primary consumers, and decomposers, producers, primary consumers, secondary consumers, top carnivores, and decomposers. The genes shows independent assortment. The decrease in pH eliminated all nitrogen-fixing bacteria populations in the area. b. herbivores at the bottom, carnivores in the middle, and primary producers at the top. B) typically 10 times higher in a clear-cut watershed atmosphere A) 7C 41) If the flow of energy in an arctic ecosystem goes through a simple food chain, perhaps involving humans, starting from phytoplankton to zooplankton to fish to seals to polar bears, then which of the following could be accurate? 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