You’ll see credit for completing this quiz in “Unit 8 Cumulative Assessment.”
This same quiz can be completed for the same credit on the Biomania AP Bio App. Click here to download Biomania (free for students enrolled in a course with a teacher using Learn-Biology.com).
Trophic Levels, Population Growth, Community Ecology, Biodiversity Click-on Challenge
[i] Notice the timer in the upper right. Your goal is to work as quickly and accurately as possible.
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Ecology Click On Challenge|552d0ce43758f” question_number=”1″ unit=”8.Ecology” topic=”8.2.Energy_Flow_Through_Ecosystems”] TOPIC: Trophic levels. The producers have 7,000,000 units of energy.
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The trophic level with the most harvestable energy.
Good job. The producers would have the most harvestable energy.
HINT FOR NEXT TIME: Ecological producers have the most harvestable energy.
If the producers have 7,000,000 units of energy, then the organisms in this trophic level would have 70,000 units of energy
Awesome! If the producers have 7,000,000 units of energy, the 2dary consumers will have 70,000.
HINT FOR NEXT TIME: Only 10% of the energy is passed from one trophic level to the next. If the producers have 7,000,000 units, then the primary consumers will have 10% of 7,000,000. Take 10% of that and you’ll have your answer.
The source of all the energy in this ecosystem.
Correct! In almost every ecosystem, the sun is the source the energy.
HINT FOR NEXT TIME: What powers photosynthesis?
If the producers have 7,000,000 units of energy, then the organisms in this trophic level have 7000 units of energy.
Good job. If the producers have 7,000,000 units of energy, then the third level consumers will have 7,000 units of energy.
HINT FOR NEXT TIME: Start with 7,000,000 units. The primary consumers will have 10% of that. The secondary consumers will have 10% of the energy in the primary consumers. How much will be in the tertiary consumers (like the eagle)?
Represents the 90% of energy lost between trophic levels.
Excellent. The arrows represent the energy that’s lost between trophic levels.
HINT FOR NEXT TIME. If the thin black arrows represent the energy that’s transferred between trophic levels, then what could represent the energy that’s not transferred?
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Ecology Click On Challenge|14bd54d91094f6″ question_number=”2″ unit=”8.Ecology” topic=”8.3-4.Population_Growth”] TOPIC: Population Growth
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The letter that represents the most rapid exponential growth phase
Terrific! “B” is rapid exponential growth
HINT FOR NEXT TIME: You’re looking for the steepest part of the curve.
The letter that represents the carrying capacity
That’s right! “E” is carrying capacity.
HINT FOR NEXT TIME: This is the maximum population size that the environment will allow.
The letter that represents when limiting factors are slowing population growth (but the population is still growing).
Very nice! At point “C,” the N is approaching K, and population growth is slowing.
HINT FOR NEXT TIME: Find where the slope of population growth is starting to level off.
The letter that represents when the population has reached carrying capacity.
Way to go! At “D” the population has reached carrying capacity
HINT FOR NEXT TIME: Look for the point when the rate of growth has dropped to zero.
Good job! The seastar is the keystone species in this system.
HINT FOR NEXT TIME: The keystone species is a top-level predator.
If the keystone species is removed, this species expands. reducing diversity.
Nice! In this system, the mussels are the species that the sea stars control, which keeps the mussels from expanding and outcompeting all the other species in this system.
HINT FOR NEXT TIME: In this system, the main species that the sea stars are controlling sounds like the contractile tissue you use to move your body.
If the keystone species is removed, this species will be outcompeted.
Exactly: Removing the sea stars allows the mussels to expand, reducing the chitons, limpets, sea snails, and barnacles.
HINT FOR NEXT TIME: If the sea stars are removed, the mussels expand. Every other species will be reduced or eliminated.
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Ecology Click On Challenge|e0918c5c06e37″ question_number=”7″ unit=”8.Ecology” topic=”8.5-6.Community_Ecology_and_Biodiversity”] TOPIC: Simpson’s Biodiversity Index
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The community with the lowest species richness
Correct! With only 3 species, community A has the lowest species richness.
HINT FOR NEXT TIME: Species richness is a measure of the number of species in a community. Which community has the smallest number of species?
The community with the lowest species evenness.
Awesome. Community “C” has the lowest species evenness.
HINT FOR NEXT TIME: Species evenness is defined by how evenly distributed the members of various species are within a community. Find the community where the species are NOT evenly represented.
The community with the highest overall diversity.
Nice job! Community “B” has the highest species richness and evenness, giving it the highest diversity.
HINT FOR NEXT TIME: Find the community with the highest species richness (number of species) AND highest evenness (most even distribution of species) giving it the highest overall diversity.
[x]
[restart]
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Biogeochemical Cycles and Eutrophication Click-on Challenge
No. Fossil fuels include coal and petroleum (oil).
The letter for fossil fuel extraction
Nice job! “I” repesents fossil fuel extraction.
No. Fossil fuel extraction includes drilling for oil and natural gas, and mining coal.
The number for machines that consume fossil fuels.
Exellent. “6” shows machines that consume fossil fuels.
No. Look for something that’s receiving fossil fuels, and releasing something that enters the atmosphere.
The letter for the arrow representing fossil fuel combustion.
Correct. “J” represents carbon dioxide produced by combustion
No. Find and arrow that connects what’s put out by machines and the atmosphere.
The letter representing cellular respiration by decomposers.
Way to go! “G” represents carbon dioxide released during cellular respiration by decomposers.
No. Look for an arrow that connects decomposers with the atmosphere.
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Biogeochemical Cycles and Eutrophication|17d762532ddda5″ question_number=”5″ unit=”8.Ecology” topic=”8.2.Biogeochemical Cycles”] The phosphorus cycle
540 x 266
Letter for phosphate from weathering entering the soil.
Awesome! “A” shows phosphate from weathering entering the soil.
No. Find a phosphate ion in the soil, and note the source.
The letter for assimilation of phosphate from weathering by plants
Nice! “B” shows assimilation of phosphate by a plant .
No. Find an arrow that represents the movement of phosphate into a plant.
The letter for assimilation, by plants, of phosphate released by decomposers into the soil.
Yes! “C” shows the release and subsequent assimilation of phosphate from decomposers.
No. Look for the decomposers, then for an arrow between decomposers and a plant.
The letter for consumption on land
Good work! “F” shows a land animal consuming a plant.
No. Look for an land animal consuming a plant.
The letter for release of phosphate in feces or urine
Way to go. “G” shows release of phosphate in feces or urine.
No. Look for an arrow that connects an animal to feces and urine.
The letter for phosphate mining.
Terrific. “H” represents phosphate mining.
No. Look for a phosphate ion that’s associated with mountains, machines, and agriculture.
The letter representing phosphate runoff from agriculture
Correct! “J” represents phosphate runoff from agriculture.
No. Look for a phosphate ion that’s originating in a field and entering a body of water.
The letter representing natural phosphate runoff from the soil.
That’s right. ”I” represents natural phosphate runoff from the soil into a body of water.
No. Look for the arrow connecting a phosphate ion in the water to the soil.
The letter for phosphate assimilation by algae
Exactly! “L” shows assimilation of phosphate by algae.
No. Look for an arrow connecting phosphate with algae in the water.
The letter for the process that removes phosphate from the phosphorus cycle for long periods of time.
That’s right. “M” represents deposition of phosphate into marine sediments.
No. Look for the arrow that shows phosphates being deposited into marine sediments.
The letter for volcanic activity or geological uplift, which returns phosphate to surface.
Nice! “O” represents geological activity (vulcanism or uplift) that returns phosphorus to the cycle.
No. Look for an arrow that goes from marine sediments to a mountain.
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Biogeochemical Cycles and Eutrophication|17d1e4071feda5″ question_number=”6″ unit=”8.Ecology” topic=”8.7.Disruptions_to_Ecosystems”] Cultural Eutrophication
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The letter for agricultural runoff
Nice! “A” represents agricultural runoff
No. Agricultural runoff involves excess phosphates and nitrates from agriculture that enter waterways.
The letter for runoff from sewage treatement plants.
Yes! “B” represents runoff from sewage treatment.
No. Find where the fluid released from a sewage treatment pipe in bringing excess nitrates and phosphates to a waterway.
The letter for the excess nitrates and phosphates that cause eutrophication.
That’s correct. Letter “C” represents the excess nitrates and phosphates that cause eutrophication.
No. Look for nitrates and phosphates that come from human activities, and which cause an algae bloom.
The letter for an algae bloom
Yes. “D” represents an algae bloom.
No. Look for a large mat of algae floating at the water’s surface.
The letter for bacterial decomposers.
Nice. “F” represent bacterial decomposers.
No. In this diagram, the bacterial decomposers are found on the bottom of a pound. They break down dead algae (shown at “e”).
The letter for the gas consumed by decomposers as they break down algal biomass.
Correct. “G” represents the oxygen gas consumed by decomposers as they break down algal biomass.
No. You’re looking for the gas consumed during aerobic respiration.
The letter representing the dead zone caused by eutrophication.
Yes. “J” represents the dead zone created by eutrophication.
No. You’re looking for the entire dead zone, with dead fish and plants, created by low oxygen conditions.
The letter(s) for the dead fish and plants killed by eutrophication.
Correct. The dead fish and plants (at “H” and “I”) are the victims of eutrophication.
No. Look for the dead fish and plants within the dead zone. These are the victims of eutrophication.
[q json=”true” hotspot_user_interaction=”label_prompt” show_hotspots=”” dataset_id=”Biogeochemical Cycles and Eutrophication|20552ad8a8f291″ question_number=”7″ unit=”8.Ecology” topic=”8.7.Disruptions_to_Ecosystems”] The Extinction Vortex
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Genetic drift, inbreeding
Yes. Small population size leads to genetic drift and inbreeding.
HINT FOR NEXT TIME: Think of the processes that would cause a small isolated population to lose its genetic diversity. Where would that go on this flowchart?
Lowered birth rate, higher death rate.
Correct! Reduced fitness and adaptability will increase a population’s death rate and decrease its birth rate.
HINT FOR NEXT TIME: Think about the consequences of reduced fitness. Where would that go on this flow chart?
Smaller population
Great job! Smaller population would result from lowered population growth and would lead to an even smaller population.
HINT FOR NEXT TIME: Small and isolated populations enter into a vicious cycle. Where would “smaller population” leading to an even smaller population go on this flow chart?
