Ecology Test Study Guide
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Questions and Answers

What is an ecosystem?

  • A living part of an ecosystem
  • All the living and nonliving things that interact in an area (correct)
  • A relationship between two species
  • The study of interactions among organisms
  • What is a habitat?

    the place where an organism lives and that provides the things it needs

    What is an abiotic factor?

    a nonliving part of an ecosystem

    What is a biotic factor?

    <p>a living part of an ecosystem</p> Signup and view all the answers

    What is photosynthesis?

    <p>the process in which organisms use water along with sunlight and carbon dioxide to make food</p> Signup and view all the answers

    What is a species?

    <p>a group of organisms that are similar and reproduce fertile offspring</p> Signup and view all the answers

    What is a population?

    <p>all the members of one species in a particular area</p> Signup and view all the answers

    What is a community?

    <p>all the different populations that live together in an area</p> Signup and view all the answers

    What is ecology?

    <p>the study of how living things interact with each other and their environment</p> Signup and view all the answers

    What is a biome?

    <p>a group of ecosystems with similar climates and organisms</p> Signup and view all the answers

    What is predation?

    <p>an interaction in which one organism kills and eats another</p> Signup and view all the answers

    What is a predator?

    <p>the organism that does the killing in predation</p> Signup and view all the answers

    What is prey?

    <p>an organism that is killed in predation</p> Signup and view all the answers

    What is a niche?

    <p>an organism's particular role in an ecosystem, or how it makes its living</p> Signup and view all the answers

    What is natural selection?

    <p>process by which individuals that are better adapted to the environment are more likely to survive and reproduce than others</p> Signup and view all the answers

    What is adaptation?

    <p>the behaviors and physical characteristics of species that allow them to live successfully in their environments</p> Signup and view all the answers

    What is competition?

    <p>the struggle between organisms for the limited resources in a habitat</p> Signup and view all the answers

    What is commensalism?

    <p>a relationship between two species in which one species benefits and the other is neither helped nor harmed</p> Signup and view all the answers

    What is parasitism?

    <p>a relationship in which one organism lives on or inside another and harms it</p> Signup and view all the answers

    What is a parasite?

    <p>the organism that benefits by living on or in a host in parasitism</p> Signup and view all the answers

    What is a host?

    <p>the organism that a parasite lives in or on in parasitism</p> Signup and view all the answers

    What is mutualism?

    <p>a relationship between two species in which both species benefit</p> Signup and view all the answers

    What is a producer?

    <p>an organism that can make its own food</p> Signup and view all the answers

    What is a consumer?

    <p>an organism that obtains energy by feeding on other organisms</p> Signup and view all the answers

    What are herbivores?

    <p>consumers that eat only plants</p> Signup and view all the answers

    What are carnivores?

    <p>consumers that eat only animals</p> Signup and view all the answers

    What are omnivores?

    <p>a consumer that eats both plants and animals</p> Signup and view all the answers

    What is a scavenger?

    <p>a carnivore that feeds on the bodies of the dead</p> Signup and view all the answers

    What are decomposers?

    <p>organisms that break down wastes and dead organisms and return raw materials to the environment</p> Signup and view all the answers

    What is a food chain?

    <p>a series of events in which one organism eats another and obtains energy</p> Signup and view all the answers

    What is a food web?

    <p>consists of the many overlapping food chains in an ecosystem</p> Signup and view all the answers

    What is an energy pyramid?

    <p>diagram that shows the amount of energy from one feeding level to another in a food web</p> Signup and view all the answers

    Study Notes

    Key Concepts in Ecology

    • Ecosystem: Combination of living (biotic) and nonliving (abiotic) elements interacting in a specific area.
    • Habitat: Specific location where an organism resides and obtains necessary resources for survival.
    • Abiotic Factors: Nonliving components such as water, air, and minerals influencing ecosystem dynamics.
    • Biotic Factors: Living organisms within an ecosystem that interact and affect each other's survival.

    Organism Dynamics

    • Photosynthesis: Process by which organisms convert sunlight, water, and carbon dioxide into food, essential for plant life.
    • Species: A grouping of similar organisms capable of producing fertile offspring.
    • Population: All individuals of a particular species inhabiting a defined area.
    • Community: Diverse populations coexisting within a specific environmental space.

    Foundation of Ecology

    • Ecology: Scientific discipline exploring the interactions among organisms and their environments.
    • Biome: Larger regional classifications of ecosystems sharing common climatic conditions and life forms.

    Interactions and Relationships

    • Predation: Interaction where one organism (predator) kills and consumes another (prey), crucial for regulating populations.
    • Niche: A specific role played by an organism within an ecosystem, including its habitat and interactions.
    • Natural Selection: Evolutionary mechanism favoring individuals better suited to their environments, enhancing survival and reproduction.

    Adaptation and Competition

    • Adaptation: Traits and behaviors developed by species that enable success in their environments.
    • Competition: Rivalry among organisms for limited resources like food, space, and mates, influencing population dynamics.

    Ecological Relationships

    • Commensalism: Symbiotic relationship where one species benefits while the other is neither helped nor harmed.
    • Parasitism: Relationship wherein one organism (parasite) benefits at the expense of another (host), often causing harm.
    • Mutualism: Interdependent relationship where both species involved benefit.

    Trophic Levels

    • Producers: Organisms that generate their own food, forming the base of the food web.
    • Consumers: Organisms that derive energy by consuming other organisms, categorized into herbivores, carnivores, and omnivores.
    • Scavengers: Carnivores that eat dead organisms, facilitating nutrient recycling.
    • Decomposers: Break down dead material, returning vital nutrients to the ecosystem.

    Energy Flow

    • Food Chain: Linear sequence depicting energy transfer as one organism consumes another.
    • Food Web: Complex interrelated networks of multiple food chains in an ecosystem, illustrating diverse dietary relationships.
    • Energy Pyramid: Represents energy flow between trophic levels, indicating energy loss at each transfer from producers to consumers.

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    Description

    Prepare for your ecology test with these flashcards covering essential terms and definitions. Understand important concepts such as ecosystems, habitats, and both biotic and abiotic factors that influence living organisms. Ideal for students seeking a comprehensive review.

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