Marine Ecology
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Brewster
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ENVIRONMENTAL SCIENCE
Marine Ecology
Marine Environment
Saltwater's subtle shifts can tip the balance between thriving reefs and barren seas
30 hours ago
0
What is a primary reason marine habitats are vulnerable to environmental changes?
Because marine habitats are isolated and unaffected by human activities
Because marine species can quickly adapt to any changes in their environment
Because marine life depends on specific saltwater conditions that are easily disrupted
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FordMotor
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ENVIRONMENTAL SCIENCE
Marine Ecology
Seagrass Meadows
Underwater grass beds quietly shield coastlines and trap climate-warming carbon
30 hours ago
0
What is a primary ecological benefit of seagrass meadows beyond providing habitat?
They stabilize sediments and protect shorelines from erosion.
They primarily serve as breeding grounds for deep-sea fish species.
They are mainly important because they produce large amounts of oxygen like terrestrial forests.
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123_Steve
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ENVIRONMENTAL SCIENCE
Marine Ecology
Baltic Sea Dead Zone
Nutrient overload turns parts of the Baltic Sea into vast underwater deserts of oxygen.
2 days ago
0
What is the primary cause of the Baltic Sea dead zone's hypoxia?
Natural geological oxygen depletion
Overfishing reducing oxygen consumption
Excessive nutrient pollution from agricultural runoff and sewage
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Piston1
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ENVIRONMENTAL SCIENCE
Marine Ecology
Overfishing
Industrial fishing's rise triggered a cascade of marine ecosystem collapses worldwide
2 days ago
0
Which type of overfishing directly threatens the future population by removing too many juvenile fish?
Growth overfishing
Ecosystem overfishing
Recruitment overfishing
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FordMotor
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ECOLOGY
Marine Ecology
Intertidal Zone
Life on the edge: how creatures thrive where land meets sea's relentless tides
3 days ago
0
What is the primary challenge organisms face in the intertidal zone that shapes their adaptations?
Constant deep water immersion without exposure to air
The alternating exposure to water and air due to tides
Stable environmental conditions with little change
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Steeeve
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ENVIRONMENTAL SCIENCE
Marine Ecology
Marine Habitat
Hidden worlds beneath the waves reveal marine life’s astonishing adaptability.
3 days ago
0
Which factor most directly influences the diversity of species in a marine habitat?
The total size of the ocean
The amount of freshwater input alone
Environmental conditions like depth, temperature, and salinity
S
Steve_O
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GEOGRAPHY
Marine Ecology
Arlington Reef
Decades of monitoring Arlington Reef reveal hidden resilience amid climate threats
4 days ago
0
What was the primary impact of the Australian Institute of Marine Science's 1987 survey on Arlington Reef?
It led to the immediate restoration of damaged coral areas through artificial reefs.
It established long-term monitoring that improved understanding of coral health and resilience.
It proved that Arlington Reef was unaffected by environmental changes and did not require monitoring.
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Nellieger
I am studying psychology
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ENVIRONMENTAL SCIENCE
Marine Ecology
Overfishing
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Industrial-scale fishing has triggered ecosystem collapses by wiping out key marine predators
5 days ago
Overfishing has stealthily pushed many fish populations to the brink of collapse, often without immediate notice. When fish are removed from their habitats faster than they can reproduce, entire ecosystems begin to unravel. This isn't...
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123_Steve
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ENVIRONMENTAL SCIENCE
Marine Ecology
Dead Zones in Oceans and Lakes
Nutrient pollution turns vibrant waters into vast underwater deserts threatening marine life
6 days ago
0
What is the primary cause of dead zones in aquatic environments?
Excess nutrients from human activities causing oxygen depletion
Natural seasonal changes in water temperature
Overfishing leading to reduced fish populations
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PeterPan
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BIOLOGY
Marine Ecology
Marine Food Chain
Invisible algae sustain the ocean’s largest creatures through a hidden energy highway
8 days ago
0
What is the primary role of phytoplankton in the marine food chain?
They produce energy through photosynthesis, forming the base of the food chain.
They consume zooplankton to transfer energy to higher predators.
They are top predators controlling fish populations.
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Bonbo
Me as you
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ENVIRONMENTAL SCIENCE
Marine Ecology
Fisheries
Half a billion people rely on fisheries, yet overfishing threatens their future
11 days ago
0
What is the primary challenge fisheries face in balancing economic benefits and ecological health?
Lack of demand for fish products
Overfishing leading to declines in fish populations
Fish farming completely eliminates environmental impacts
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Bonbo
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ENVIRONMENTAL SCIENCE
Marine Ecology
Coral Reef
Tiny coral polyps build vast underwater cities that support a quarter of ocean life
14 days ago
0
What is the primary reason coral reefs are considered sensitive indicators of ocean health?
Because they are made of hard rocks that do not change over time
Because their survival depends on a delicate balance of water temperature, clarity, and chemistry
Because coral reefs can survive in any ocean condition without stress
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Steve_O
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ENVIRONMENTAL SCIENCE
Marine Ecology
Marine Environment
Saltwater shapes life in ocean habitats from sunlit reefs to dark abyssal plains
10 Feb 2026
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What is a key factor that defines and supports marine habitats?
The availability of freshwater sources nearby
The presence and properties of saltwater in the sea
The presence of terrestrial plants and animals
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Bonbo
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GEOGRAPHY
Marine Ecology
Intertidal Zone
The intertidal zone hosts diverse marine life adapted to survive both underwater and exposed conditions
25 Jan 2026
0
What adaptations enable organisms in the intertidal zone to survive the changing conditions between high and low tides?
Ability to live only underwater without exposure to air
Ability to migrate to deeper waters during low tide
Ability to tolerate changes in moisture, temperature, and salinity
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Steeeve
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ENVIRONMENTAL SCIENCE
Marine Ecology
Marine Environment
Exploring the diverse habitats that sustain life in the vast marine environment
21 Jan 2026
0
How do variations in salinity and temperature influence the distribution of marine habitats?
They have no significant effect since all marine species can adapt to any salinity or temperature.
They only affect freshwater habitats and have no impact on marine environments.
They determine the types of species that can survive in different marine habitats by affecting physiological tolerance and ecosystem dynamics.
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