Introduction To Marine Biology Exam
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Questions and Answers
- 1.
All of the following are basic examples of abiotic factors except
- A.
Salinity
- B.
Predation
- C.
Substrate
- D.
Temperature
- E.
Light
Correct Answer
B. PredationExplanation
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.Rate this question:
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- 2.
The type of relationship in which one partner benefits and other is not harmed or helped is
- A.
Symbiosis
- B.
Commensalism
- C.
Parasitism
- D.
Mutualism
Correct Answer
B. CommensalismExplanation
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.Rate this question:
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- 3.
The intertidal zone is the area:
- A.
Between low and high tide
- B.
Beyond the continental shelf
- C.
Between the subtidal zone and the continental shelf
- D.
Where plagic organisms live
- E.
Above the highest tide
Correct Answer
A. Between low and high tideExplanation
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.Rate this question:
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- 4.
Which of the following best describes an ecosystem?
- A.
All living organisms in one area
- B.
The physical environment in an area
- C.
All the living organisms in an area and the abiotic factors
Correct Answer
C. All the living organisms in an area and the abiotic factorsExplanation
An ecosystem refers to the interaction between all living organisms and the non-living components (abiotic factors) in a specific area. It encompasses the relationships and dependencies between plants, animals, microorganisms, and their physical surroundings such as temperature, water, soil, and sunlight. This answer accurately describes the comprehensive nature of an ecosystem, highlighting the importance of both living and non-living elements in shaping its functioning and dynamics.Rate this question:
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- 5.
WHICH OF THE FOLLOWING IS AN ORGANIC SUBSTANCE ?
- A.
H20
- B.
C2H12O6
- C.
CO2
- D.
O2
Correct Answer
B. C2H12O6Explanation
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.Rate this question:
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- 6.
A GREAT WHITE SHARK WOULD BE PART OF WHICH OF THE FOLLOWING MARINE LIFESTYLES?
- A.
PLANKTON
- B.
EPIFAUNA
- C.
BOTHOS
- D.
NEKTON
Correct Answer
D. NEKTONExplanation
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.Rate this question:
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- 7.
A SEA ANEMONE WOULD BE PART OF WHICH OF THE FOLLOWING MARINE LIFESTYLES ?
- A.
PLANKTON
- B.
BENTHOS
- C.
NEKTON
Correct Answer
B. BENTHOSExplanation
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.Rate this question:
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- 8.
ORGANISMS THAT CANNOT PRODUCE THEIR OWN FOOD AND MUST OBTAIN ENERGY BY EATING ORGANIC MATTER THAT ALREADY EXIST ARE CALLED
- A.
Producers
- B.
Nekton
- C.
Decomposers
- D.
Consumers
Correct Answer
C. DecomposersExplanation
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.Rate this question:
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- 9.
The breaking down of organic matter (food)releasing the energy it contains for use by the organism is
- A.
Primary production
- B.
Photosynthesis
- C.
Chemosynthesis
- D.
Cellular respiration
Correct Answer
D. Cellular respirationExplanation
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.Rate this question:
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- 10.
The place where an organism lives
- A.
Ecosystem
- B.
Niche
- C.
Community
Correct Answer
A. EcosystemExplanation
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.Rate this question:
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- 11.
Marine organisms that live in or on the bottom are called?
- A.
Nekton
- B.
Plankton
- C.
Benthos
- D.
Endotherms
Correct Answer
C. BenthosExplanation
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.Rate this question:
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- 12.
Which of the following would not be a niche ?
- A.
Coral reef
- B.
Predator
- C.
Cleaning fish
Correct Answer
A. Coral reefExplanation
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.Rate this question:
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- 13.
Animal that live within the sediment of the sea bottom are
- A.
Aphotic
- B.
Infauna
- C.
Epifauna
- D.
Nekton
Correct Answer
B. InfaunaExplanation
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.Rate this question:
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- 14.
Which of the following is not a micromolecule?
- A.
Protein
- B.
Nutrient
- C.
Lipid
- D.
Carbohydrate
Correct Answer
A. ProteinExplanation
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.Rate this question:
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- 15.
The zone in the ocean where there is some light but not enough for photosynthesis
- A.
Twilight zone
- B.
Aphotic zone
- C.
Abyssal zone
- D.
Photic zone
Correct Answer
A. Twilight zoneExplanation
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.Rate this question:
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- 16.
Tiny photosynthetic members of the plankton are called
- A.
Zooplankton
- B.
Phytoplankton
- C.
Nekton
- D.
Meroplankton
Correct Answer
C. NektonExplanation
Tiny photosynthetic members of the plankton are called phytoplankton. These microscopic organisms include various types of algae and cyanobacteria that drift near the surface of bodies of water, using sunlight to produce energy through photosynthesis and forming the base of many aquatic food chains.Rate this question:
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- 17.
Larvae would be which type of zooplankton?
- A.
Meroplankton
- B.
Holoplankton
- C.
Phytoplankton
Correct Answer
C. PhytoplanktonExplanation
Meroplankton are a distinct category of zooplankton characterized by their temporary existence in the planktonic community. Unlike holoplankton, which spend their entire lifecycle in the planktonic state, meroplankton, such as larvae of various marine organisms, only occupy this floating ecosystem for a portion of their lives. This phase typically encompasses the early, developmental stages of their lifecycle. After undergoing metamorphosis or reaching a certain growth milestone, these organisms transition out of the planktonic state to assume their adult forms, often settling on the ocean floor or becoming active swimmers. This transitional nature of meroplankton plays a crucial role in the marine food web, linking the microscopic world of plankton with larger marine ecosystems.Rate this question:
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- 18.
All the chemical reactions that take place in an organism is called
- A.
Metabolism
- B.
Cellular respiration
- C.
Chemosynthesis
Correct Answer
A. MetabolismExplanation
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.Rate this question:
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- 19.
The zone in the ocean where there is plenty of light for photosynthesis
- A.
Twilight zone
- B.
Aphotic zone
- C.
Abyssal zone
- D.
Photic zone
Correct Answer
D. Photic zoneExplanation
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.Rate this question:
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- 20.
Benthic animals crawl about on the sea bottom or sit firmly attached to it are called
- A.
Sessile
- B.
Epifauna
- C.
Macrofauna
- D.
Plankton
Correct Answer
B. EpifaunaExplanation
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.Rate this question:
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- 21.
Plankton in the ocean would be found in which zone ?
- A.
Pelagic
- B.
Abyssal
- C.
Bathyal
Correct Answer
A. PelagicExplanation
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.Rate this question:
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- 22.
Would of the following would not generally be a reason for symbiosis ?
- A.
Protection
- B.
Reproduction
- C.
Transportation
- D.
Food
Correct Answer
B. ReproductionExplanation
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.Rate this question:
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Apr 15, 2024Quiz Edited by
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Jun 06, 2012Quiz Created by
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