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General Biology: Unifying Themes and Scientific Inquiry

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  • What is biology?

    Biology is the scientific study of life and living organisms.

  • What are the five unifying themes of biology?

    Organization, Information, Energy and Matter, Interactions, and Evolution.

  • What is biological organization?

    Life is studied at different levels from molecules to the entire biosphere, including cells, tissues, organs, populations, and ecosystems.

  • What are emergent properties in biology?

    New properties that arise at each level of biological organization due to the arrangement and interaction of parts.

  • What is reductionism in biology?

    An approach that studies complex systems by breaking them down into simpler components.

  • What is systems biology?

    The study of interactions among parts of a biological system to understand the whole system.

  • How are structure and function related in biology?

    At each level of biological organization, structure correlates with function; understanding one helps understand the other.

  • What is the cell theory?

    All living organisms are made of cells, which are the basic units of structure and function in life.

  • What distinguishes prokaryotic and eukaryotic cells?

    Prokaryotic cells lack a nucleus and membrane-enclosed organelles; eukaryotic cells have these structures.

  • What role does DNA play in living organisms?

    DNA contains genetic material that stores information for building molecules and directs development.

  • What is gene expression?

    The process of converting information from a gene into a cellular product, usually a protein.

  • What is the central dogma of molecular biology?

    DNA is transcribed into RNA, which is then translated into protein.

  • What is genomics?

    The study of whole sets of genes in one or more species.

  • What is proteomics?

    The study of whole sets of proteins and their properties.

  • How does energy flow through an ecosystem?

    Energy enters as sunlight, flows through producers and consumers, and exits as heat; chemicals recycle within the ecosystem.

  • What is feedback regulation in biological systems?

    A process where the output of a system regulates that very system, often through negative or positive feedback.

  • What is evolution?

    The process by which living organisms are modified descendants of common ancestors, explaining unity and diversity of life.

  • What are the three domains of life?

    Bacteria and Archaea (prokaryotes), and Eukarya (eukaryotes).

  • What is natural selection?

    The mechanism of evolution where individuals with advantageous traits are more likely to survive and reproduce.

  • What are the conditions required for natural selection?

    Variation among individuals, heritable variation, and differential reproductive success.

  • What is the scientific method?

    A process involving observation, hypothesis formation, prediction, experimentation, and conclusion to test hypotheses.

  • What is the difference between discovery science and hypothesis-driven science?

    Discovery science describes nature; hypothesis-driven science explains nature through testing hypotheses.

  • What is a controlled experiment?

    An experiment comparing an experimental group with a control group differing in only one variable.

  • Why is peer review important in science?

    It ensures research is vetted by other experts before publication, maintaining scientific integrity.

  • How do diverse viewpoints benefit science?

    Diversity in backgrounds and perspectives leads to more robust, valuable, and productive scientific inquiry.