Bio Ch55, BIO 109 UNIT II Picture Questions, Chapter 53, Unit 6 Mastering Biology, AP Biology Chapters 52-54 Test, biology exam 1
Consider the food chain of grass → grasshopper → mouse → snake → hawk. About how much of the chemical energy fixed by photosynthesis of the grass (100 percent) is available to the hawk? A) 0.01% B) 0.1% C) 1% D) 10%
0.01%
On the diagram of the nitrogen cycle, which number represents nitrite (NO2)? A) 1 B) 2 C) 3 D) 4
3
A porcupine eats 3000 J of plant material. Of this, 2100 J is indigestible and is eliminated as feces, 800 J are used in cellular respiration, and 100 J are used for growth and reproduction. What is the approximate production efficiency of this animal? A) 0.03% B) 3% C) 10% D) 33%
3%
D
30) Which of the following is a conclusion that can be drawn from this graph? a. Female survivability is more negatively affected by larger brood size than is male survivability. b. Male survivability decreased by 50% between reduced and enlarged brood treatments. c. Both males and females had increases in daily hunting with the enlarged brood size. d. There appears to be a negative correlation between brood enlargements and parental survival. e. Chicks in reduced brood treatment received more food, weight gain, and reduced mortality.
On the diagram of the nitrogen cycle, which number represents the ammonium ion (NH4+)? A) 1 B) 2 C) 3 D) 4
4
Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5000 J of animal material. The owl loses 2300 J in feces and owl pellets and uses 2500 J for cellular respiration. What is the production efficiency of this owl? A) 0.02% B) 0.2% C) 4% D) 40%
4%
C
40) Which of the following graphs refer to this equation? dN/dt = 0.5 N
C
41) Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24-hour period?
E
42) Which of the following graphs illustrates the growth curve of a small population of rodents that has grown to reach a static carrying capacity?
A
43) Which of the following is a likely graphic outcome of a population of deer introduced to an island with an adequate herbivory and without natural predators, parasites, or disease?
D
44) Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat in northern Canada?
2) An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square mile in one woodlot and 20 per square mile on another woodlot. What was the ecologist comparing? A) density B) dispersion C) carrying capacity D) quadrats E) range
A
6) The most common kind of dispersion in nature is A) clumped. B) random. C) uniform. D) indeterminate. E) dispersive.
A
8) Which of the following groups would be most likely to exhibit uniform dispersion? A) red squirrels, who actively defend territories B) cattails, which grow primarily at edges of lakes and streams C) dwarf mistletoes, which parasitize particular species of forest tree D) moths in a city at night E) lake trout, which seek out deep water
A
9) A table listing such items as age, observed number of organisms alive each year, and life expectancy is known as a (an) A) life table. B) mortality table. C) survivorship table. D) rate table. E) insurance table.
A
Diagram of a food web (arrows represent energy flow and letters represent species) If the figure above represents a marine food web, the smallest organism might be _____. A) A B) C C) I D) E
A
Food web for a particular terrestrial ecosystem (arrows represent energy flow and letters represent species) Examine this food web for a particular terrestrial ecosystem. Which species is autotrophic? A) A B) C C) D D) E
A
A
Assuming these age-structure diagrams describe human populations, in which population is unemployment likely to be a societal issue in the future? a. I b. II c. III d. No differences in the magnitude of future unemployment would be expected among these populations. e. It is not possible to infer anything about future social conditions from age-structure diagrams.
C
Assuming these age-structure diagrams describe human populations, which population is likely to experience zero population growth (ZPG)? a. I b. II c. III d. I and II e. II and III
10) Life tables are most useful in determining which of the following? A) carrying capacity B) the fate of a cohort of newborn organisms throughout their lives C) immigration and emigration rates D) population dispersion patterns E) reproductive rates
B
3) To measure the population density of monarch butterflies occupying a particular park, 100 butterflies are captured, marked with a small dot on a wing, and then released. The next day, another 100 butterflies are captured, including the recapture of 20 marked butterflies. One would estimate the population to be A) 200. B) 500. C) 1,000. D) 10,000. E) 900,000.
B
5) You are observing a population of lizards when you notice that the number of adults has increased and is higher than previously observed. One explanation for such an observation would include A) reduction in death rate. B) increased immigration. C) increased emigration. D) decreased emigration. E) increased birth rate.
B
Food web for a particular terrestrial ecosystem (arrows represent energy flow and letters represent species) Examine this food web for a particular terrestrial ecosystem. Species C is toxic to predators. Which species is most likely to benefit from being a mimic of C? A) A B) B C) C D) E
B
After looking at the figure above, what can be said about productivity in this ecosystem? A) Nothing can be said based on this information. B) Between 80% and 90% of the energy is lost between most trophic levels. C) Between 10% and 20% of the energy is lost between most trophic levels. D) Productivity increases with each trophic level.
Between 80% and 90% of the energy is lost between most trophic levels.
1) A population is correctly defined as having which of the following characteristics? I. inhabiting the same general area II. individuals belonging to the same species III. possessing a constant and uniform density and dispersion A) I only B) III only C) I and II only D) II and III only E) I, II, and III
C
17) In order to construct a reproductive table for a sexual species, you need to A) assess sperm viability. B) keep track of all of the offspring of a cohort. C) keep track of the females in a cohort. D) keep track of all of the offspring of the females in a cohort. E) keep track of the ratio of deaths to births in a cohort.
C
21) Long-term studies of Beldingʹs ground squirrels show that immigrants move nearly 2 km from where they are born and make up 1 to 8% of the males and 0.7 to 6% of the females in other populations. On an evolutionary scale, why is this significant? A) These immigrants make up for the deaths of individuals keeping the other populationsʹ size stable. B) Young reproductive males tend to stay in their home population and are not driven out by other territorial males. C) These immigrants provide a source of genetic diversity for the other populations. D) Those individuals that emigrate to these new populations are looking for less crowded conditions with more resources. E) Gradually, the populations of ground squirrels will move from a uniform to a clumped population pattern of dispersion.
C
Food web for a particular terrestrial ecosystem (arrows represent energy flow and letters represent species) Examine this food web for a particular terrestrial ecosystem. Which pair of species could be omnivores? A) A and D B) B and C C) C and D D) C and E
C and E
19) To measure the population of lake trout in a 250 hectare lake, 200 individuals were netted and marked with a fin clip, and then returned to the lake. The next week, the lake is netted again, and out of the 200 lake trout that are caught, 50 have fin clips. Using the capture-recapture estimate, the lake trout population size could be closest to which of the following? A) 200 B) 250 C) 400 D) 800 E) 40,000
D
4) During the spring, you are studying the mice that live in a field near your home. There are lots of mice in this field, but you realize that you rarely observe any reproductive females. This most likely indicates A) that there is selective predation on female mice. B) that female mice die before reproducing. C) that this habitat is a good place for mice to reproduce. D) that you are observing immigrant mice. E) that the breeding season is over
D
7) Uniform spacing patterns in plants such as the creosote bush are most often associated with A) chance. B) patterns of high humidity. C) the random distribution of seeds. D) competitive interactions among individuals in the population. E) the concentration of nutrients within the populationʹs range.
D
If you applied a fungicide to a cornfield, what would you expect to happen to the rate of decomposition and net ecosystem production (NEP)? A) Both decomposition rate and NEP would decrease. B) Both decomposition rate and NEP would increase. C) Decomposition rate would increase and NEP would decrease. D) Decomposition rate would decrease and NEP would increase.
Decomposition rate would decrease and NEP would increase.
18) Which of the following examples would most accurately measure the density of the population being studied? A) counting the number of prairie dog burrows per hectare B) counting the number of times a 1 kilometer transect is intersected by tracks of red squirrels after a snowfall C) counting the number of coyote droppings per hectare D) multiplying the number of moss plants counted in 10, 1m2 quadrats by 100 to determine the density per kilometer2. E) counting the number of zebras from airplane census observations.
E
20) Which of the following assumptions have to be made regarding the capture -recapture estimate of population size? I. Marked and unmarked individuals have the same probability of being trapped. II. The marked individuals have thoroughly mixed with population after being marked. III. No individuals have entered or left the population by immigration or emigration, and no individuals have been added by birth or eliminated by death during the course of the estimate. A) I only B) II only C) I and II only D) II and III only E) I, II, and III
E
Food web for a particular terrestrial ecosystem (arrows represent energy flow and letters represent species) Examine this food web for a particular terrestrial ecosystem. Which species is most likely a decomposer on this food web? A) A B) B C) C D) E
E
Why does a vegetarian leave a smaller ecological footprint than an omnivore? A) Fewer animals are slaughtered for human consumption. B) There is an excess of plant biomass in all terrestrial ecosystems. C) Vegetarians need to ingest less chemical energy than omnivores. D) Eating meat is an inefficient way of acquiring photosynthetic productivity.
Eating meat is an inefficient way of acquiring photosynthetic productivity.
Which of the following is primarily responsible for limiting the number of trophic levels in most ecosystems? A) Many primary and higher-order consumers are opportunistic feeders. B) Decomposers compete with higher-order consumers for nutrients and energy. C) Nutrient cycling rates tend to be limited by decomposition. D) Energy transfer between trophic levels is usually less than 20 percent efficient.
Energy transfer between trophic levels is usually less than 20 percent effcient.
Suppose you are studying the nitrogen cycling in a pond ecosystem over the course of a month. While you are collecting data, a flock of one hundred Canada geese lands and spends the night during a fall migration. What could you do to eliminate error in your study as a result of this event? A) Find out how much nitrogen is consumed in plant material by a Canada goose over about a twelve-hour period, multiply this number by 100, and add that amount to the total nitrogen in the ecosystem. B) Find out how much nitrogen is eliminated by a Canada goose over about a twelve-hour period, multiply this number by 100, and subtract that amount from the total nitrogen in the ecosystem. C) Find out how much nitrogen is consumed and eliminated by a Canada goose over about a twelve-hour period and multiply this number by 100; enter this +/- value into the nitrogen budget of the ecosystem. D) Put a net over the pond so that no more migrating flocks can land on the pond and alter the nitrogen balance of the pond.
Find out how much nitrogen is consumed and eliminated by a Canada goose over about a twelve-hour period and multiply this number by 100; enter this +/- value into the nitrogen budget of the ecosystem.
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 true? A) Polar bears can provide more food for humans than seals can. B) The total biomass of the fish is lower than that of the seals. C) Seal populations are larger than fish populations. D) Fish can potentially provide more food for humans than seal meat.
Fish can potentially provide more food for humans than seal meat.
The correct answer: A
Ground tissue is indicated by the letter _____.
Which of the following locations are major reservoirs for carbon for the carbon cycle? I) atmosphere II) sediments and sedimentary rocks III) fossilized plant and animal remains (coal, oil, and natural gas) IV) plant and animal biomass A) only I and III B) only II and IV C) only II, III, and IV D) I, II, III, and IV
I, II, III, and IV
During a year, plants never use 100% of the incoming solar radiation for photosynthesis. What is a reasonable explanation for this? I) Plants cannot photosynthesize as well during winter (in cold winter climates). II) Plants cannot photosynthesize as well on cloudy days. III) The pigments that drive photosynthesis respond to only a fraction of the wavelengths that are available. A) only I B) only II C) only III D) I, II, and III
I, II, and III
Once heat is transferred to the soil, where does it go next (reference the study by Noormets et al. 2004)? I) The heat is emitted back to the atmosphere. II) Theheatistransferredtoothersoillayers. III) The heat is stored in the soil. A) only I B) only II C) only III D) I, II, and III
I, II, and III
...
Identify A
...
Identify B
Polar Nuclei
Identify C
...
Identify D
...
Identify E
After looking at the experiment in the figure above, what can be said about productivity in marine ecosystems? A) Nothing can be said based on this information. B) Marine organisms break down iron for energy and thus for productivity. C) Iron can be a limiting nutrient in productivity. D) Productivity increases when chlorophyll a is added.
Iron can be a limiting nutrient in productivity.
Which statement best describes what ultimately happens to the chemical energy that is not converted to new biomass in the process of energy transfer between trophic levels in an ecosystem? A) It is undigested and winds up in the feces and is not passed on to higher trophic levels. B) It is used by organisms to maintain their life processes through the reactions of cellular respiration. C) Heat produced by cellular respiration is used by heterotrophs for thermoregulation. D) It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics.
It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics.
Matter is gained or lost in ecosystems. How does this occur? A) Chemoautotrophic organisms can convert matter to energy. B) Matter can be moved from one ecosystem to another. C) Photosynthetic organisms convert solar energy to sugars. D) Heterotrophs convert heat to energy.
Matter can be moved from one ecosystem to another.
Why do logged tropical rain forest soils typically have nutrient-poor soils? A) Tropical bedrock contains little phosphorous. B) Logging results in soil temperatures that are lethal to nitrogen-fixing bacteria. C) Most of the nutrients in the ecosystem are removed in the harvested timber. D) The cation exchange capacity of the soil is reversed as a result of logging.
Most of the nutrients in the ecosystem are removed in the harvested timber.
Why is net primary production (NPP) a more useful measurement to an ecosystem ecologist than gross primary production (GPP)? A) NPP can be expressed in energy/unit of area/unit of time. B) NPP can be expressed in terms of carbon fixed by photosynthesis for an entire ecosystem. C) NPP represents the stored chemical energy that is available to consumers in the ecosystem. D) NPP shows the rate at which the standing crop is utilized by consumers.
NPP represents the stored chemical energy that is available to consumers in the ecosystem.
Which of the following is a true statement regarding mineral nutrients in soils and their implication for primary productivity? A) Globally, phosphorous availability is most limiting to primary productivity. B) Adding a nonlimiting nutrient will stimulate primary productivity. C) Phosphorous is sometimes unavailable to producers due to leaching. D) Alkaline soils are more productive than acidic soils.
Phosphorous is sometimes unavailable to producers due to leaching.
E
Pith is indicated by the letter _____.
The correct answer: A
Primary growth has occurred in the region(s) indicated by the letter(s) _____.
Acid precipitation lowered the pH of soil in a terrestrial ecosystem that supported a diverse community of plants and animals. The decrease in pH eliminated all nitrogenfixing bacteria populations in the area. Which prediction most accurately reflects the impact this will have on the community? A) Since phosphorus can replace nitrogen as an essential nutrient, the impact will be minimal. B) Plants can obtain the nitrogen necessary for growth from the atmosphere, but bacterial communities will be negatively impacted. C) Primary producers will suffer from nitrogen deficiency and the entire community will experience a decrease in carrying capacity. D) The decrease in pH actually increases the availability of soil nutrients, so other nutrients that were less available cause an increase in primary production and an increase in biomass at other trophic levels.
Primary producers will suffer from nitrogen deficiency and the entire community will experience a decrease in carrying capacity.
How is it that satellites can detect differences in primary productivity on Earth? A) Satellite instruments can detect reflectance patterns of the photosynthetic organisms of different ecosystems. B) Sensitive satellite instruments can measure the amount of NADPH (nicotinamide adenine dinucleotide phosphate) produced in the summative light reactions of different ecosystems. C) Satellites compare the wavelengths of light captured and reflected by photoautotrophs in different ecosystems. D) Satellites detect differences by measuring the amount of water vapor emitted by transpiring producers.
Satellites compare the wavelengths of light captured and reflected by photoautotrophs in different ecosystems.
The correct answer: B and D
Secondary growth has occurred in the region(s) indicated by the letter(s) _____.
Why is terrestrial productivity higher in equatorial climates? A) Productivity increases with temperature. B) Productivity increases with water availability. C) Productivity increases with available sunlight. D) The answer is most likely a combination of the other responses.
The answer is most likely a combination of the other responses.
The correct answer: secondary xylem
The letter A indicates _____.
cortex
The letter A indicates the _____.
The correct answer: epidermis
The letter A indicates_________
Which of the following statements is correct about biogeochemical cycling? A) The phosphorus cycle involves the recycling of atmospheric phosphorus. B) The phosphorus cycle involves the weathering of rocks. C) The carbon cycle has maintained a constant atmospheric concentration of carbon dioxide for the past million years. D) The nitrogen cycle involves movement of diatomic nitrogen between the biotic and abiotic components of the ecosystem.
The phosphorus cycle involves the weathering of rocks.
The correct answer: D
The region surrounded by guard cells is indicated by the letter _____.
Use the following information to answer the question(s) below. Abstract: Increased radiative forcing is an inevitable part of global climate change, yet little is known of its potential effects on the energy fluxes in natural ecosystems. To simulate the conditions of global warming, we exposed peat monoliths (depth, 0.6 cm; surface area, 2.1 m2) from a bog and fen in northern Minnesota, USA, to three infrared (IR) loading (ambient, +45, and +90 W m-2) and three water table (-16, -20, and -29 cm in bog and -1, -10 and -18 cm in fen) treatments, each replicated in three mesocosm plots. Net radiation (Rn) and soil energy fluxes at the top, bottom, and sides of the mesocosms were measured in 1999, five years after the treatments had begun. Soil heat flux (G) increased proportionately with IR loading, comprising about 3%-8% of Rn. In the fen, the effect of IR loading on G was modulated by water table depth, whereas in the bog, it was not. Energy dissipation from the mesocosms occurred mainly via vertical exchange with air, as well as the deeper soil layers through the bottom of the mesocosms, whereas lateral fluxes were 10- to 20-fold smaller and independent of IR loading and water table depth. The exchange with deeper soil layers was sensitive to water table depth, in contrast to G, which responded primarily to IR loading. The qualitative responses in the bog and fen were similar, but the fen displayed wider seasonal variations and greater extremes in soil energy fluxes. The differences of G in the bog and fen are attributed to differences in the reflectance in the long waveband as a function of vegetation type, whereas the differences in soil heat storage may also depend on different soil properties and different water table depth at comparable treatments. These data suggest that the ecosystem-dependent controls over soil energy fluxes may provide an important constraint on biotic response to climate change. Copyright © 2004 Springer-Verlag (A. Noormets et al. 2004. The effects of infrared loading and water table on soil energy fluxes in northern peatlands. Ecosystems 7:573-582.) The Noormets et al. study (2004) shows that there was an ecosystem-specific control over soil energy fluxes, and this constrained the biotic response to climate change. How do you think radiative heat would affect the water table in a wetland versus a temperate forest? A) The wetland would likely absorb less heat than the temperate forest and, therefore, not significantly change water table depth. B) The wetland would likely absorb more heat than the temperate forest and significantly change water table depth. C) The temperate forest would likely absorb more heat than the wetland and significantly change water table depth. D) Both areas would absorb similar amounts of radiative heat and, therefore, affect the water table equally.
The wetland would likely absorb more heat than the temperate forest and significantly change water table depth.
How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top-level predators? A) Top-level predators are destined to have small populations that are sparsely distributed. B) Predators have relatively large population sizes. C) Predators are more disease-prone than animals at lower trophic levels. D) Top-level predators are more likely to be stricken with parasites.
Top-level predators are destined to have small populations that are sparsely distributed.
C
Which population appears to be stable? a. I b. II c. III d. I and II e. II and III
B
Which population is in the process of decreasing? a. I b. II c. III d. I and II e. II and III
D
Xylem is indicated by the letter _____
Which of the following would be considered an example of bioremediation? A) adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability B) using a bulldozer to regrade a strip mine C) dredging a river bottom to remove contaminated sediments D) adding seeds of a chromium-accumulating plant to soil contaminated by chromium
adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability
Which category in the figure above makes available the highest productivity per square meter? A) tropical wet forest B) open ocean C) algal beds and reefs D) wetlands
algal beds and reefs
Which of the following is an example of an ecosystem? A) all of the brook trout in a 500-square-hectare river drainage system B) the plants, animals, and decomposers that inhabit an alpine meadow C) the intricate interactions of the various plant and animal species on a savanna during a drought D) all of the organisms and their physical environment in a tropical rain forest
all of the organisms and their physical environment in a tropical rain forest
For most terrestrial ecosystems, pyramids composed of species abundances, biomass, and energy are similar in that they have a broad base and a narrow top. The primary reason for this pattern is that _____. A) secondary consumers and top carnivores require less energy than producers B) at each step, energy is lost from the system C) biomagnification of toxic materials limits the secondary consumers and top carnivores D) top carnivores and secondary consumers have a more general diet than primary producers
at each step, energy is lost from the system
Consider the global water cycle depicted in the figure above. Which one of the reserves contains the smallest percentage of global water? A) rivers and lakes B) polar ice caps C) glaciers D) atmosphere
atmosphere
If the sun were to suddenly stop providing energy to Earth, most ecosystems would vanish. Which of the following ecosystems would likely survive the longest after this hypothetical disaster? A) tropical rain forest B) tundra C) benthic ocean D) desert
benthic ocean
Nitrifying bacteria participate in the nitrogen cycle mainly by _____. A) converting nitrogen gas to ammonia B) releasing ammonium from organic compounds, thus returning it to the soil C) converting ammonium to nitrate, which plants absorb D) incorporating nitrogen into amino acids and organic compounds
converting ammonium to nitrate, which plants absorb
As big as it is, the ocean is nutrient-limited. If you wanted to investigate this phenomenon, one reasonable approach would be to _____. A) observe Antarctic Ocean productivity from year to year to see if it changes B) experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas C) compare nutrient concentrations between the photic zone and the benthic zone in various marine locations D) contrast nutrient uptake by autotrophs in marine locations that are different temperatures
experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas
Which of the following ecosystems would likely have the largest net primary productivity per hectare and why? A) open ocean, because of the total biomass of photosynthetic autotrophs B) grassland, because of the small standing crop biomass that results from consumption by herbivores and rapid decomposition C) tundra, because of the incredibly rapid period of growth during the summer season D) cave, due to the lack of photosynthetic autotrophs
grassland, because of the small standing crop biomass that results from consumption by herbivores and rapid decomposition
Which of the following terms encompasses all of the others? A) heterotrophs B) herbivores C) carnivores D) primary consumers
heterotrophs
Consider the global nitrogen cycle depicted in the figure above. How are humans altering this cycle? A) industrial nitrogen fixation B) nitrogen lost to the atmosphere C) reduction of nitrogen available to terrestrial ecosystems D) reduction of nitrogen fixation by bacteria
industrial nitrogen fixation
Diagram of a food web (arrows represent energy flow and letters represent species) If the figure above represents a terrestrial food web, the combined biomass of C + D would probably be _____. A) greater than the biomass of A B) greater than the biomass of B C) less than the biomass of A + B D) less than the biomass of E
less than the biomass of A + B
Which one of the following correctly ranks these organisms in order from lowest to highest percent in production efficiency? A) mammals, fish, insects B) insects, fish, mammals C) fish, insects, mammals D) mammals, insects, fish
mammals, fish, insects
Consider the global nitrogen cycle depicted in the figure above. What is the limiting portion of the cycle for plants? A) industrial nitrogen fixation B) nitrogen lost to the atmosphere C) internal nitrogen cycling in the oceans D) nitrogen fixation by bacteria
nitrogen fixation by bacteria
How can biodiversity affect the way we decontaminate industrial sites? I) Bacteria have been found to be able to detoxify certain chemicals; perhaps there are more. II) Trees produce sawdust, which can be used to soak up chemicals. III) Species evolving in contaminated areas could adapt and detoxify the area. A) only I B) only II C) only III D) only II and III
only I
The Hubbard Brook watershed deforestation experiment revealed that _____. I) deforestation increased water runoff II) nitrate concentration in waters draining the deforested area became dangerously high III) calcium levels remained high in the soil of deforested areas A) only I B) only II C) only III D) only I and II
only I and II
What do researchers typically focus on when they study a particular biogeochemical cycle? I) the nature and size of the reservoirs II) the rate of element movement between reservoirs III) interaction of the current cycle with other cycles A) only I B) only II C) only III D) only II and III
only II and III
Based on the experiment in the figure above, which of the following are plausible reasons for the result? I) No nutrients evaporate now that vegetation is absent. II) Nutrients dissolve in the water running through the watershed. III) Nutrients are attached to small particles of sand or clay that leave the watershed. IV) Plant roots that held soil particles in place are no longer there. A) only I and III B) only II and IV C) only I, II, and IV D) only II, III, and IV
only II, III, and IV
Which habitat type in the figure above makes available the most new tissue to consumers? A) tropical wet forest B) open ocean C) algal beds and reefs D) wetlands
open ocean
Which habitat types in the figure above cover the largest area? A) tropical wet forest plus the ocean neritic zone B) open ocean C) algal beds and reefs plus the ocean neritic zone D) wetlands plus the ocean neritic zone
open ocean
You own three hundred acres of patchy temperate forest. Which one of the following actions would increase the net primary productivity of the area the most? A) adding fertilizer to the entire area B) introducing one hundred rabbits into the area C) planting five hundred new trees D) relocating all of the deer found in the area
planting five hundred new trees
To recycle nutrients, an ecosystem must have, at a minimum, _____. A) producers B) producers and decomposers C) producers, primary consumers, and decomposers D) producers, primary consumers, secondary consumers, and decomposers
producers and decomposers
The discipline that applies ecological principles to returning degraded ecosystems to a more natural state is known as _____. A) landscape ecology B) conservation ecology C) restoration ecology D) resource conservation
restoration ecology
The first step in ecosystem restoration is to _____. A) restore the physical structure B) restore native species that have been extirpated due to disturbance C) remove competitive invasive species D) remove toxic pollutants
restore the physical structure
The goal of restoration ecology is to _____. A) replace a ruined ecosystem with a more suitable ecosystem for that area B) return degraded ecosystems to a more natural state C) manage competition between species in human-altered ecosystems D) prevent further degradation by protecting an area with park status
return degraded ecosystems to a more natural state
Considering its total area covered, which ecosystem type represented in the figure above has a very low level of economic impact on Earth's ecosystem? A) tropical wet forest B) rock, sand, and ice C) tropical seasonal forest D) ocean neritic zone
rock, sand, and ice
Which trophic level is most vulnerable to extinction? A) producer level B) primary consumer level C) secondary consumer level D) tertiary consumer level
tertiary consumer level
How is net ecosystem production (NEP) typically estimated in ecosystems? A) the amount of heat energy released by the ecosystem B) the net flux of carbon dioxide or oxygen in or out of an ecosystem C) the rate of decomposition by detritivores D) the annual total of incoming solar radiation per unit of area
the net flux of carbon dioxide or oxygen in or out of an ecosystem
Which of the following has the greatest effect on the rate of chemical cycling in an ecosystem? A) the ecosystem's rate of primary production B) the production efficiency of the ecosystem's consumers C) the rate of decomposition in the ecosystem D) the trophic efficiency of the ecosystem
the rate of decomposition in the ecosystem
Which of the following organisms is INCORRECTLY paired with its trophic level? A) cyanobacterium — primary producer B) grasshopper — primary consumer C) zooplankton — primary producer D) fungus — detritivore
zooplankton - primary producer