Ocean Zones And Lifestyles Quiz
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Organisms that float at the surface of the ocean are called:
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Neuston
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Nekton
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Neritic
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None of the above
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Explore the diverse zones and life forms of the ocean in the 'Ocean Zones and Lifestyles Quiz'. This quiz assesses knowledge on marine organisms and their habitats, from surface-floating neuston to deep-sea benthos, enhancing understanding of marine ecology and oceanography.
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- 2.
Organisms that live in or on the sea floor are called:
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Nekton
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Neuston
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Plankton
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Benthos
Correct Answer
A. BenthosExplanation
Benthos refers to organisms that live in or on the sea floor. This term encompasses a wide range of organisms, including plants, animals, and microorganisms. These organisms are adapted to the unique conditions of the sea floor and play important roles in the marine ecosystem. Nekton refers to organisms that are capable of swimming and are not restricted to the sea floor. Neuston refers to organisms that live at the air-water interface. Plankton refers to organisms that drift in the water column and are unable to swim against the current.Rate this question:
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- 3.
The top zone of the ocean is called the:
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Hadal Zone
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Epipelagic Zone
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Nocturnal Zone
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Mesopelagic Zone
Correct Answer
A. Epipelagic ZoneExplanation
The top zone of the ocean is called the Epipelagic Zone. This zone is also known as the sunlight or euphotic zone, as it is the uppermost layer where sunlight can penetrate. It extends from the surface down to about 200 meters and is characterized by abundant sunlight and high levels of dissolved oxygen. This zone is home to a variety of marine life, including phytoplankton, zooplankton, and small fish, which form the base of the ocean food chain.Rate this question:
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- 4.
The deepest parts of the ocean are in the:
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Abyssal Zone
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Bathypelagic Zone
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Hadal Zone
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Epipelagic Zone
Correct Answer
A. Hadal ZoneExplanation
The correct answer is Hadal Zone. The Hadal Zone refers to the deepest parts of the ocean, specifically the areas found in oceanic trenches. These trenches can reach depths of over 6,000 meters and are characterized by extreme pressures, low temperatures, and complete darkness. The Hadal Zone is home to unique and highly adapted organisms that have evolved to survive in these harsh conditions.Rate this question:
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- 5.
Organisms that swim in the water column are called:
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Neuston
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Plankton
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Benthos
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Nekton
Correct Answer
A. NektonExplanation
Nekton refers to organisms that are capable of swimming and moving independently in the water column. This category includes various marine animals like fish, whales, dolphins, and squid. Unlike plankton, which are drifters, nektonic organisms have the ability to actively control their movement and are not at the mercy of currents. Neuston refers to organisms that live at the air-water interface, while benthos refers to organisms that live on or in the bottom sediment of aquatic environments.Rate this question:
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- 6.
A vase sponge is considered:
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Neuston
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Nekton
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Plankton
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Benthic (Benthos)
Correct Answer
A. Benthic (Benthos)Explanation
A vase sponge is considered benthic (benthos) because it is a sessile organism that lives attached to the ocean floor. Benthic organisms live in or on the bottom sediments of aquatic environments, and they play an important role in the ecosystem by providing habitat for other organisms and contributing to nutrient cycling. Vase sponges are typically found in shallow, coastal areas and are well adapted to their benthic lifestyle, with a body structure that allows them to filter feed and obtain nutrients from the surrounding water.Rate this question:
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- 7.
The Keyhole Sandollar is:
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Infauna
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Epipelagic
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Epifauna
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Epiflora
Correct Answer
A. EpifaunaExplanation
The Keyhole Sandollar is classified as an epifauna. Epifauna refers to organisms that live on the surface of the substrate or other organisms. In the case of the Keyhole Sandollar, it is a type of sea urchin that lives on the ocean floor and attaches itself to rocks or other hard surfaces. This classification distinguishes it from infauna, which refers to organisms that live within the substrate, and epipelagic, which refers to organisms that live in the uppermost layer of the ocean. Epiflora, on the other hand, refers to plants that live on the surface of the water.Rate this question:
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- 8.
The Portuguese Man-of-War is considered:
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Nekton
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Epifauna
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Neuston
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Nekton
Correct Answer
A. NeustonExplanation
The Portuguese Man-of-War is considered a neuston because it is a marine organism that floats on the surface of the water. Neuston refers to organisms that live in the top few centimeters of the water column, taking advantage of surface tension to remain at the water's surface. The Portuguese Man-of-War has a float that allows it to float on the surface, while its tentacles trail beneath to capture prey. This adaptation allows it to thrive in the open ocean, where it can be carried by currents and winds.Rate this question:
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- 9.
The Atlantic Green Sea Turtle is considered:
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Nekton
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Plankton
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Epifauna
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Neuston
Correct Answer
A. NektonExplanation
The Atlantic Green Sea Turtle is considered nekton because it is a strong swimmer and actively moves through the water column. Nekton refers to organisms that have the ability to swim against the current and are not passively carried by water currents like plankton. Epifauna refers to organisms that live on the surface of the substrate, while neuston refers to organisms that live at the air-water interface.Rate this question:
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- 10.
The ____________ zone of the ocean is the only zone that is well lit from the sun.
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Aphotic
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Photic
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Hadal
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Neritic
Correct Answer
A. PhoticExplanation
The photic zone of the ocean is the only zone that is well lit from the sun. This is because it is the uppermost layer of the ocean where sunlight can penetrate. The sunlight provides the necessary energy for photosynthesis to occur, which supports the growth of phytoplankton and other photosynthetic organisms. As a result, this zone is characterized by abundant marine life and is crucial for the ocean's food chain.Rate this question:
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Current Version
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Mar 26, 2025Quiz Edited by
ProProfs Editorial Team -
Oct 24, 2012Quiz Created by
DaniD33
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