Practice Questions On Ecosystem! Quiz

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Practice Questions On Ecosystem! Quiz - Quiz

Do you think you can pass this set of practice questions on an ecosystem? An ecosystem is a community of living organisms in tandem with non-living components of their environment interacting as a system. These items are connected through nutrient cycles and energy flows. Energy comes in by way of photosynthesis and is incorporated into plant tissue. If you need practice questions for a test, this is the quiz for you.


Questions and Answers
  • 1. 

    What is the correct order of taxa from top to bottom?

    • A.

      Kingdom, Class, Phylum, Family, Order, Genus, Species

    • B.

      Kingdom, Family, Class, Phylum, Genus, Species

    • C.

      Kingdom, Phylum, Order, Class, Family, Genus, Species

    • D.

      Kingdom, Phylum, Class, Order, Family, Genus, Species

    Correct Answer
    D. Kingdom, Phylum, Class, Order, Family, Genus, Species
    Explanation
    The correct order of taxa from top to bottom is Kingdom, Phylum, Class, Order, Family, Genus, Species. This is the standard hierarchical classification system used in biology to categorize organisms based on their characteristics and evolutionary relationships. The kingdom is the highest level, followed by phylum, class, order, family, genus, and species. Each level becomes more specific, with species being the most specific category.

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  • 2. 

    What is the initial energy source for almost all communities

    • A.

      Light

    • B.

      Photosynthesis

    • C.

      Heat

    • D.

      Water

    Correct Answer
    A. Light
    Explanation
    The initial energy source for almost all communities is light. This is because light is necessary for photosynthesis, the process by which plants convert light energy into chemical energy. Photosynthesis is the primary way in which energy enters ecosystems, as plants are the foundation of most food chains. They use light energy to produce glucose, which is then used by other organisms as a source of energy. Therefore, light is essential for the survival and functioning of communities.

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  • 3. 

    A trophic level is a position on the food chain representing the type of substance an organisms eats.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A trophic level is not determined by the type of substance an organism eats, but rather by its position in the food chain. Each trophic level represents a different level of energy transfer and consumption within an ecosystem. Organisms within the same trophic level may consume different types of substances, but they occupy the same position in the food chain. Therefore, the statement that a trophic level represents the type of substance an organism eats is false.

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  • 4. 

    An autotroph is a(n)

    • A.

      Organisms that secretes enzymes onto dead or decaying organic matter which causes decompostion then absorbs the products.

    • B.

      Organism that synthesises its own carbon from inorganic materials.

    • C.

      Organism that synthesis its own carbon from organic materials

    • D.

      Organism that acquires its carbon from organic sources

    Correct Answer
    B. Organism that synthesises its own carbon from inorganic materials.
    Explanation
    An autotroph is an organism that synthesizes its own carbon from inorganic materials. This means that autotrophs are capable of converting simple inorganic substances, such as carbon dioxide, into complex organic molecules, like glucose, through a process called photosynthesis. This ability allows autotrophs to produce their own food and energy, without relying on consuming other organisms. In contrast, heterotrophs acquire their carbon from organic sources, such as consuming other organisms or their byproducts. Therefore, the correct answer is that an autotroph is an organism that synthesizes its own carbon from inorganic materials.

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  • 5. 

    Whats the correct formula for population size given that B = births, I = immigration, D = deaths and E = emigration

    • A.

      ( B + D ) - ( I + E )

    • B.

      ( B - I ) + ( D - E )

    • C.

      ( E - D ) + ( B - E )

    • D.

      ( B - D ) + ( I - E )

    Correct Answer
    D. ( B - D ) + ( I - E )
    Explanation
    The formula for population size is calculated by subtracting the number of deaths (D) from the number of births (B), and then adding the number of immigrants (I) and subtracting the number of emigrants (E). This formula takes into account the natural increase in population through births and deaths, as well as the impact of immigration and emigration on the population size.

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  • 6. 

    The consequences of a global temperature rise on arctic ecosystems would include..  Select the most suitable answer

    • A.

      A larger rate of polar bears swimming north, rise of temperature in arctic regions, less coniferous forests, higher CO2 levels in atmosphere

    • B.

      Everyone will die and drown because the sea levels will rise

    • C.

      Polar ice-caps will melt, arctic species will become extinct, CO2 will increase in the atmosphere, permafrost turning into tundra

    • D.

      Loss of ice habitat, increased success of pest species, tundra turning to wetland, coniferous forests will expand where tundra previously existed, expansion of range of habitats available to temperate species

    Correct Answer
    D. Loss of ice habitat, increased success of pest species, tundra turning to wetland, coniferous forests will expand where tundra previously existed, expansion of range of habitats available to temperate species
    Explanation
    The consequences of a global temperature rise on arctic ecosystems would include the loss of ice habitat, which would have a detrimental impact on polar bears and other arctic species. Additionally, the increased temperature would lead to the expansion of pest species, disrupting the delicate balance of the ecosystem. The tundra would also undergo a transformation, turning into wetland due to the melting permafrost. As a result of these changes, coniferous forests would expand into areas previously occupied by tundra, creating a shift in habitat range for temperate species.

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  • 7. 

    Populations tend to produce more offspring than the environment can support

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Populations tend to produce more offspring than the environment can support in order to increase their chances of survival. This is because not all offspring will survive to reproductive age due to limited resources and competition for those resources. By producing more offspring, populations increase the likelihood that at least some will survive and pass on their genes to the next generation. This phenomenon, known as overproduction, is a common strategy in nature to ensure the survival and success of a species.

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  • 8. 

    What is the correct definition of evolution?

    • A.

      Evolution is the process by which favourable characteristics are selected over time by nature.

    • B.

      Evolution is the process by which living organisms are formed, by gradual change, from previous organisms.

    • C.

      Evolution is Darwin's theory concerning the links between organisms through a series of human induced change.

    • D.

      Evolution is the process by which organisms have developed over time in order to survive.

    Correct Answer
    B. Evolution is the process by which living organisms are formed, by gradual change, from previous organisms.
    Explanation
    Evolution is the process by which living organisms are formed, by gradual change, from previous organisms. This definition accurately describes the concept of evolution as the gradual change and development of living organisms over time, with new species arising from previous ones through natural selection and adaptation. It highlights the idea that all organisms are connected through a common ancestry and have evolved through genetic changes and adaptations to their environment.

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  • 9. 

    A _____________ is a group of related organisms having common characteristics, capable of breeding and producing fertile off-spring.

    Correct Answer
    species
    Explanation
    A species refers to a group of related organisms that share common characteristics and are able to reproduce with one another, producing offspring that are capable of reproducing as well. This definition highlights the concept of reproductive compatibility and the ability to pass on genetic traits to future generations. The term "species" is used to categorize and classify different types of organisms based on their shared characteristics and reproductive capabilities.

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  • 10. 

    ______________   is the study of relationships between living organisms and their environment

    Correct Answer
    Ecology
    Explanation
    Ecology is the study of relationships between living organisms and their environment. It focuses on understanding how organisms interact with each other and with their surroundings, including their physical and biological environments. This field of study explores various aspects such as the distribution and abundance of organisms, their interactions with other species, and how they adapt to their environment. By studying ecology, scientists can gain insights into the complex web of relationships that exist in nature and how these relationships impact the overall health and functioning of ecosystems.

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  • 11. 

    A _______________ is the interaction of different populations within a specific area.

    Correct Answer
    community
    Explanation
    A community refers to the interaction of different populations within a specific area. It involves the relationships, interactions, and interdependencies between various species that coexist in a particular habitat or ecosystem. Communities are characterized by the sharing of resources, competition for resources, and the flow of energy and nutrients among the different populations. This interaction is essential for the functioning and stability of ecosystems, as each population plays a unique role in maintaining the balance and biodiversity of the community.

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  • 12. 

    A _________ is a group of individual organisms of the same species living within a specific area.

    Correct Answer
    population
    Explanation
    A population refers to a group of individual organisms of the same species that live within a specific area. This term is used to describe the collective group of individuals that share common characteristics and interact with each other within a particular habitat. The concept of population is essential in understanding the dynamics of species distribution, abundance, and ecological processes such as competition, predation, and reproduction. It helps scientists study and analyze the factors that influence the size and structure of a group of organisms in a given area.

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  • 13. 

    Explain how natural selection leads to evolution and explain an example of evolution in response to a human induce change.

  • 14. 

    Explain how energy and nutrients enter, move through, and exit a food chain in an ecosystem.

  • 15. 

    Distinguish between a consumer, detritivore and sapritroph.

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