Introduction To Marine Biology Exam

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  • 1/22 Questions

    Which of the following best describes an ecosystem?

    • All living organisms in one area
    • The physical environment in an area
    • All the living organisms in an area and the abiotic factors
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About This Quiz

The 'Introduction to Marine Biology Exam' assesses knowledge on marine ecosystems, focusing on abiotic factors, relationships like commensalism, and the role of organisms like sharks. It enhances understanding of marine life interactions and environmental factors.

Introduction To Marine Biology Exam - Quiz

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  • 2. 

    The place where an organism lives

    • Ecosystem

    • Niche

    • Community

    Correct Answer
    A. Ecosystem
    Explanation
    The correct answer is ecosystem. An ecosystem refers to the interaction between living organisms and their physical environment within a specific area. It includes all the living organisms, such as plants, animals, and microorganisms, as well as the non-living components like soil, water, and air. It encompasses the relationships and energy flow between different species and their environment. Therefore, an ecosystem is the appropriate term to describe the place where an organism lives, as it encompasses the entire ecological system within a given area.

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  • 3. 

    All of the following are basic examples of abiotic factors except

    • Salinity

    • Predation

    • Substrate

    • Temperature

    • Light

    Correct Answer
    A. Predation
    Explanation
    Abiotic factors are non-living components of an ecosystem that can influence the organisms living in it. Examples of abiotic factors include salinity, substrate, temperature, and light. However, predation is not an abiotic factor because it involves the interaction between living organisms, specifically the act of one organism hunting and consuming another. Predation is considered a biotic factor as it involves the relationship between different living organisms within an ecosystem.

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  • 4. 

    WHICH OF THE FOLLOWING IS AN ORGANIC SUBSTANCE ?

    • H20

    • C2H12O6

    • CO2

    • O2

    Correct Answer
    A. C2H12O6
    Explanation
    C2H12O6 is an organic substance because it is a carbohydrate known as glucose. Organic substances are compounds that contain carbon atoms bonded to hydrogen atoms, and glucose fits this criteria as it consists of carbon, hydrogen, and oxygen atoms. In contrast, H20 (water), CO2 (carbon dioxide), and O2 (oxygen) are inorganic substances as they do not contain carbon-hydrogen bonds.

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  • 5. 

    A SEA ANEMONE WOULD BE PART OF WHICH OF THE FOLLOWING MARINE LIFESTYLES ?

    • PLANKTON

    • BENTHOS

    • NEKTON

    Correct Answer
    A. BENTHOS
    Explanation
    A sea anemone would be part of the benthos marine lifestyle. Benthos refers to organisms that live on or near the ocean floor. Sea anemones are sessile creatures that attach themselves to rocks or other surfaces on the seabed. They are not capable of swimming or moving freely in the water column like plankton or nekton. Instead, they rely on their tentacles to capture prey that comes within their reach. Sea anemones are commonly found in coastal areas and are an important part of benthic ecosystems.

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  • 6. 

    The type of relationship in which one partner benefits and other is not harmed or helped is 

    • Symbiosis

    • Commensalism

    • Parasitism

    • Mutualism

    Correct Answer
    A. Commensalism
    Explanation
    Commensalism is the correct answer because it refers to a type of relationship in which one partner benefits while the other is neither harmed nor helped. In commensalism, one organism benefits from the association, while the other is unaffected. This type of relationship is often seen in nature, where one organism may use another for transportation, shelter, or food without causing any harm or benefit to the host organism.

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  • 7. 

    All the chemical reactions that take place in an organism is called

    • Metabolism

    • Cellular respiration

    • Chemosynthesis

    Correct Answer
    A. Metabolism
    Explanation
    Metabolism refers to all the chemical reactions that occur within an organism. It includes processes such as breaking down food to obtain energy, converting nutrients into building blocks for cells, and eliminating waste products. Metabolism is essential for maintaining the overall functioning and survival of an organism. Cellular respiration is a specific metabolic process that involves the conversion of glucose and oxygen into energy, while chemosynthesis refers to the process by which certain organisms obtain energy by using inorganic compounds instead of sunlight.

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  • 8. 

    Plankton in the ocean would be found in which zone ?

    • Pelagic

    • Abyssal

    • Bathyal

    Correct Answer
    A. Pelagic
    Explanation
    Plankton in the ocean would be found in the pelagic zone. The pelagic zone refers to the open water column of the ocean, away from the coast and the seafloor. Plankton are microscopic organisms that float or drift in this zone, including both phytoplankton (plant-like) and zooplankton (animal-like). They are an essential part of the marine food chain, serving as a primary food source for many larger marine organisms. The pelagic zone provides the ideal conditions for plankton to thrive, as it receives ample sunlight for photosynthesis and contains nutrients necessary for their growth and reproduction.

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  • 9. 

    The intertidal zone is the area:

    • Between low and high tide

    • Beyond the continental shelf

    • Between the subtidal zone and the continental shelf

    • Where plagic organisms live

    • Above the highest tide

    Correct Answer
    A. Between low and high tide
    Explanation
    In marine biology, the intertidal zone is the area between low and high tide. This zone experiences periodic changes in water level due to the rise and fall of tides, and it is characterized by its unique ecological conditions, including exposure to air during low tide and submersion during high tide. Organisms in the intertidal zone have adapted to these fluctuations and often face challenges associated with both terrestrial and marine environments.

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  • 10. 

    Would of the following would not generally be a reason for symbiosis ?

    • Protection

    • Reproduction

    • Transportation

    • Food

    Correct Answer
    A. Reproduction
    Explanation
    Symbiosis refers to a mutually beneficial relationship between two different species. Reproduction is not generally a reason for symbiosis because symbiotic relationships are primarily based on the exchange of resources or services, rather than reproductive advantages. While reproduction can occur within a symbiotic relationship, it is not a defining characteristic or purpose of symbiosis.

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  • 11. 

    Which of the following would not be a niche ?

    • Coral reef

    • Predator

    • Cleaning fish

    Correct Answer
    A. Coral reef
    Explanation
    A coral reef cannot be considered a niche because a niche refers to the specific role or position that an organism occupies within its ecosystem. It is a specialized area where an organism can find its resources, interact with other species, and fulfill its specific ecological function. In contrast, a coral reef is a complex ecosystem itself, consisting of various organisms and their interactions, rather than a specific role or position within an ecosystem.

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  • 12. 

    Larvae would be which type of Zooplankton?

    • Meroplankton

    • Holoplankton

    • Phytoplankton

    Correct Answer
    A. Meroplankton
    Explanation
    Meroplankton are organisms that spend only a portion of their life cycle as plankton, typically during their larval stages. Larvae of many marine animals, such as fish, crabs, and mollusks, are meroplankton. They eventually develop into adult forms that are either nektonic (actively swimming) or benthic (living on the seafloor). Holoplankton, on the other hand, remain planktonic for their entire life cycle, and phytoplankton are photosynthetic organisms that are not in the zooplankton category.

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  • 13. 

    The breaking down of organic matter (food)releasing the energy it contains for use by the organism is

    • Primary production

    • Photosynthesis

    • Chemosynthesis

    • Cellular respiration

    Correct Answer
    A. Cellular respiration
    Explanation
    The breaking down of organic matter (food) and releasing the energy it contains for use by an organism is known as cellular respiration. Cellular respiration is a metabolic process that occurs in cells, where organic molecules are oxidized to produce energy, typically in the form of adenosine triphosphate (ATP), which the cell can use for various functions. This process is common to most living organisms, including plants, animals, and microorganisms.

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  • 14. 

    ORGANISMS THAT CANNOT PRODUCE THEIR OWN FOOD AND MUST OBTAIN ENERGY BY EATING ORGANIC MATTER THAT ALREADY EXIST ARE CALLED

    • Producers

    • Nekton

    • Decomposers

    • Consumers

    Correct Answer
    A. Decomposers
    Explanation
    Decomposers are organisms that obtain energy by consuming organic matter that already exists. Unlike producers, which can produce their own food through photosynthesis, decomposers rely on breaking down dead organisms and organic waste to obtain nutrients and energy. They play a crucial role in the ecosystem by recycling nutrients and breaking down organic material, contributing to the decomposition process and nutrient cycling. Nekton refers to aquatic organisms that can swim and move independently, while consumers are a broader category that includes organisms that obtain energy by consuming other organisms, including both herbivores and carnivores.

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  • 15. 

    The zone in the ocean where there is some light but not enough for photosynthesis

    • Twilight zone

    • Aphotic zone

    • Abyssal zone

    • Photic zone

    Correct Answer
    A. Twilight zone
    Explanation
    In the ocean, the "Twilight Zone" refers to the depth at which some light penetrates but is not sufficient for photosynthesis. This zone typically ranges from about 200 meters to 1000 meters below the surface. The light in this zone is too dim to support most photosynthetic life, which contrasts with the upper "Photic Zone," where there is enough light for photosynthesis. The Twilight Zone is characterized by its limited light, making it a unique and less explored area of the ocean with specialized marine life adapted to low-light conditions.

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  • 16. 

    A GREAT WHITE SHARK WOULD BE PART OF WHICH OF THE FOLLOWING MARINE LIFESTYLES?

    • PLANKTON

    • EPIFAUNA

    • BOTHOS

    • NEKTON

    Correct Answer
    A. NEKTON
    Explanation
    A Great White Shark would be part of the nekton marine lifestyle. Nekton refers to free-swimming organisms in the ocean, including fish, marine mammals like sharks, dolphins, and whales, as well as some squid and other active swimmers. These organisms are capable of independent horizontal movement and are not simply carried along by currents like plankton.

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  • 17. 

    Animal that live within the sediment of the sea bottom are

    • Aphotic

    • Infauna

    • Epifauna

    • Nekton

    Correct Answer
    A. Infauna
    Explanation
    The animals that live within the sediment of the sea bottom are referred to as infauna. These organisms are adapted to burrow and dwell within the sediments of the ocean floor, making them an integral part of the benthic ecosystem.

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  • 18. 

    The zone in the ocean where there is plenty of light for photosynthesis

    • Twilight zone

    • Aphotic zone

    • Abyssal zone

    • Photic zone

    Correct Answer
    A. Photic zone
    Explanation
    The zone in the ocean where there is plenty of light for photosynthesis is called the photic zone. This region extends from the ocean's surface to a certain depth where sunlight can penetrate, allowing photosynthetic organisms like phytoplankton and algae to thrive and produce food through photosynthesis.

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  • 19. 

    Which of the following is not a micromolecule?

    • Protein

    • Nutrient

    • Lipid

    • Carbohydrate

    Correct Answer
    A. Protein
    Explanation
    Protein is not a micromolecule because it is a macromolecule. Micromolecules are small molecules that are typically involved in cellular processes, while macromolecules are larger and more complex structures. Proteins are composed of long chains of amino acids and have a wide range of functions in the body, such as enzyme catalysis, structural support, and cell signaling. Therefore, protein is not considered a micromolecule.

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  • 20. 

    Benthic animals crawl about on the sea bottom or sit firmly attached to it are called

    • Sessile

    • Epifauna

    • Macrofauna

    • Plankton

    Correct Answer
    A. Epifauna
    Explanation
    Benthic macrofauna refers to benthic animals that live within the sediment or burrow into the sea bottom. These animals are adapted to their environment and are often filter feeders or deposit feeders. They are not able to crawl about on the sea bottom or attach themselves firmly to it like sessile organisms. Epifauna refers to benthic animals that live on the surface of the sea bottom. Plankton refers to organisms that drift in the water column. Therefore, the correct answer is Epifauna.

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  • 21. 

    Marine organisms that live in or on the bottom are called?

    • Nekton

    • Plankton

    • Benthos

    • Endotherms

    Correct Answer
    A. Benthos
    Explanation
    The correct answer is benthos. Benthos refers to marine organisms that live in or on the bottom of the ocean or other bodies of water. Plankton, on the other hand, refers to organisms that drift in the water column and do not have the ability to swim against currents. Nekton refers to organisms that are able to swim and move independently in the water. Endotherms, on the other hand, are organisms that are able to maintain a constant body temperature.

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  • 22. 

    Tiny photosynthetic members of the plankton are called ________________.

    • Zooplankton

    • Phytoplankton

    • Nekton

    • Meroplankton

    Correct Answer
    A. Phytoplankton
    Explanation
    Phytoplankton are microscopic organisms that perform photosynthesis, converting sunlight into energy and producing oxygen. They form the base of the aquatic food web and are crucial for the ecosystem. Zooplankton are animal plankton, nekton are actively swimming aquatic organisms, and meroplankton are organisms that spend part of their life cycle as plankton.

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  • Current Version
  • Dec 13, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 06, 2012
    Quiz Created by
    Exclusive_13
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