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General Biology: Scientific Method, Life Properties, and Biological Organization

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  • What is science?

    Science is a way of knowing that uses an evidence-based process of inquiry to understand the natural world through observations, hypotheses, predictions, experiments, and data analysis.

  • What are the main steps of the scientific method?

    Observe a phenomenon, ask a question, form a hypothesis, make a prediction, experiment, analyze results, and draw conclusions.

  • Define independent and dependent variables in an experiment.

    The independent variable is the factor manipulated by the researcher. The dependent variable is the measured outcome that depends on the independent variable.

  • What is a controlled experiment?

    An experiment that compares an experimental group with a control group to isolate the effect of the independent variable.

  • What is the core theme of biology?

    Evolution is the core theme, explaining the unity and diversity of life through change over generations by natural selection.

  • List the seven properties of life.

    Order, reproduction, growth and development, response to environment, energy processing, regulation, and evolutionary adaptation.

  • What is the structural and functional unit of life?

    The cell is the fundamental structural and functional unit of life.

  • How is life classified in taxonomy?

    Life is classified into hierarchical groups: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

  • Name the three domains of life.

    Domains Bacteria and Archaea contain prokaryotes; Eukarya includes protists and kingdoms Fungi, Plantae, and Animalia.

  • What are emergent properties in biological systems?

    New properties that arise from the specific arrangement and interactions of parts at each level of biological organization.

  • Describe the hierarchy of biological organization from molecule to biosphere.

    Molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

  • What is the relationship between structure and function in biology?

    Structure and function are closely related; the shape of a molecule or organ correlates with its specific function.

  • How does energy flow through an ecosystem?

    Energy enters as sunlight, is converted to chemical energy by producers, passed to consumers, and exits as heat.

  • What is the role of DNA in living organisms?

    DNA stores hereditary information and provides the blueprint for protein synthesis, controlling cell activities.

  • What is the difference between a hypothesis and a scientific theory?

    A hypothesis is a testable prediction; a scientific theory is a broad explanation supported by extensive evidence.

  • What is the significance of camouflage in the mouse population experiment?

    Mice with coat colors matching their habitat had fewer predator attacks, supporting the hypothesis that camouflage protects from predation.

  • What is the purpose of matching factors like sex, age, and health in control and experimental groups?

    To control variables that could affect results, ensuring differences are due to the independent variable.

  • What are the three spheres influencing the process of science?

    Exploration and discovery, feedback from the scientific community, and societal benefits and outcomes.

  • How are biology and technology connected?

    Technology applies scientific knowledge for practical purposes, and scientific research benefits from technological advances.

  • What is the role of systems biology?

    Systems biology models biological systems by analyzing interactions among their parts to understand emergent properties.