Characteristics and Classification of Life
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Questions and Answers

What is the smallest unit of life?

  • Tissue
  • Organism
  • Cell (correct)
  • Organ

    • Which of the following is NOT a characteristic of life?

  • The ability to maintain a constant internal environment
  • The ability to reproduce and develop
  • The ability to respond to stimuli
  • The ability to create its own energy (correct)

    • What is the process by which a population changes over time in response to its environment?

  • Reproduction
  • Homeostasis
  • Taxonomy
  • Evolution (correct)

    • Which of the following is NOT a domain of life?

    <p>Protista (A)</p> Signup and view all the answers

    What is the name of the system used to classify organisms based on their characteristics?

    <p>Taxonomy (C)</p> Signup and view all the answers

    Which of the following is NOT a level of classification used in taxonomy?

    <p>Community (D)</p> Signup and view all the answers

    What is the scientific name for humans?

    <p>Homo sapiens (C)</p> Signup and view all the answers

    What is the first step in the scientific method?

    <p>Making an observation (B)</p> Signup and view all the answers

    What is the purpose of a control group in an experiment?

    <p>To provide a baseline for comparison with the experimental group. (D)</p> Signup and view all the answers

    What is the primary characteristic of climate change that makes it distinct from natural climate variations?

    <p>The contribution of human activity to the changes. (D)</p> Signup and view all the answers

    Flashcards

    Characteristics of Life

    Common traits shared by all living organisms.

    Life is Organized

    Organisms are arranged in a hierarchy, smallest unit being cells.

    Energy Requirement

    Organisms need energy and materials from the environment.

    Reproduction and Development

    All living organisms can reproduce and undergo development.

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    Homeostasis

    Maintenance of a stable internal environment in organisms.

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    Taxonomy

    The science of classifying and naming organisms.

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    Eukarya

    One of the three domains of life, includes complex organisms.

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    Scientific Method

    A systematic approach to understanding natural phenomena.

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    Hypothesis

    A tentative explanation for a phenomenon that can be tested.

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    Experimental Design

    The process of planning how to test a hypothesis using control and test groups.

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    Model Organisms

    Living systems used in experiments for controlled variables, often mice.

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    Statistical Significance

    The likelihood that results are not due to chance or other factors.

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    Scientific Theory

    A well-accepted explanation of natural phenomena supported by evidence.

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    Placebo

    A treatment with no therapeutic effect used as a control.

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    Climate Change

    Long-term alteration of Earth's climate, primarily due to human actions.

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    Data Presentation

    The way data is organized in formats like tables and graphs for analysis.

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    Study Notes

    Characteristics of Life

    • Life is organized in a hierarchy, with cells as the smallest unit.
    • Organisms need materials and energy to maintain organization.
    • Life reproduces and develops, creating similar organisms.
    • Living things respond to their environment.
    • Maintaining internal balance (homeostasis) is crucial for life.
    • Living things adapt over time through evolution.

    Classification of Life

    • Taxonomy groups and organizes organisms.
    • Systematics studies evolutionary relationships between species.
    • Life is divided into three domains: Archaea, Bacteria, and Eukarya.
    • Eukarya includes four kingdoms: protists, fungi, plants, and animals.
    • Organisms have specific names; genus followed by species (e.g., Homo sapiens).
    • Additional categories exist (phylum, class, order, family, genus, species).

    The Scientific Method

    • Science involves an objective approach to understanding the natural world.
    • Scientists use a standard process (scientific method).
    • Observations are crucial for understanding phenomena.
    • A hypothesis explains the observed phenomenon.
    • Predictions and experiments are used to test hypotheses
    • Data is collected and analyzed using statistics.
    • Scientific theories are accepted explanations.
    • Variables must be controlled during experiments.

    Science and Society

    • Technology applies scientific knowledge to human needs.
    • Science is the basis for technology.
    • Climate change is an example of global concerns based on scientific investigation.
    • Biodiversity loss and habitat destruction are results of human activity.
    • Emerging and reemerging diseases are significant health issues, impacting globally.

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    Related Documents

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    Description

    Explore the fundamental characteristics that define life and the classification of living organisms. Understand the hierarchy of biological organization, the scientific method, and the domains of life, along with their evolutionary relationships. This quiz will test your knowledge on these essential concepts in biology.

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