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General Biology: Themes of Life and Evolution

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Termini in questo insieme (20)

  • What is biology?

    Biology is the study of life, encompassing investigation at all levels of biological organization.

  • List the 10 levels of biological organization.

    Biosphere, Ecosystem, Community, Population, Organism, Organ and Organ Systems, Tissues, Cells, Organelles, Molecules.

  • What are emergent properties in biological organization?

    Emergent properties arise from the arrangement and interaction of parts at each level, producing new functions not present at lower levels.

  • What is the smallest unit of life?

    The cell is the smallest and most basic unit of structure and function in an organism.

  • Difference between prokaryotic and eukaryotic cells?

    Prokaryotic cells lack a nucleus and membrane-bound organelles; eukaryotic cells contain a nucleus and membrane-bound organelles.

  • Name the 5 unifying themes of life.

    Order, Regulation (Homeostasis), Energy Processing, Evolutionary Adaptation, Response to Environment, Reproduction, Growth and Development.

  • What is evolution?

    Evolution is the scientific explanation for the unity and diversity of organisms and their adaptation to environments.

  • Explain the unity and diversity of life in terms of evolution.

    Unity arises from common ancestry; diversity results from heritable changes after species diverge from common ancestors.

  • Who was Charles Darwin and what did he contribute?

    Darwin developed the theory of natural selection explaining how species evolve through descent with modification.

  • What are the two main points of Darwin's 'On the Origin of Species'?

    1. Descent with modification from common ancestors.
    2. Natural selection as the mechanism for evolution.

  • What observations led Darwin to infer natural selection?

    Variation in traits, overproduction of offspring, competition, and adaptation to environments.

  • Define natural selection.

    Process where individuals with advantageous traits survive and reproduce more, increasing those traits in the population.

  • What is evolutionary adaptation?

    Traits that enhance survival and reproduction in specific environments, such as camouflage or mimicry.

  • What are the three domains of life?

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

  • How are organisms classified in taxonomy?

    By hierarchical ranks: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

  • What is the scientific name of an organism?

    The combination of its Genus and Species names, e.g., Vulpes vulpes for the red fox.

  • What is homeostasis?

    The regulation of internal conditions to maintain a stable environment within an organism.

  • What role does DNA play in life?

    DNA regulates growth and development and carries genetic information for inheritance.

  • What is the biosphere?

    The global sum of all ecosystems where life exists on Earth.

  • What is the significance of the arrangement and interaction of parts in biology?

    They produce emergent properties that define the complexity and function of living systems.