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General Biology: Evolution & Foundations of Biology

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Termini in questo insieme (28)

  • What is Evolution in biology?
    Evolution is the process of change over time that has resulted in the diversity of organisms on Earth, with all organisms being modified descendants of a common ancestor.
  • Define Emergent Properties in biological systems.
    Emergent properties are new attributes that arise in complex biological structures that did not exist at simpler levels, such as molecules having properties not found in atoms alone.
  • What is the Cell Theory?
    1) All living things are made of one or more cells. 2) Cells are the basic unit of structure and function. 3) All cells arise from pre-existing cells by division.
  • Difference between Prokaryotic and Eukaryotic cells?
    Prokaryotic cells lack membrane-bound organelles and a nucleus. Eukaryotic cells have a membrane-bound nucleus and organelles.
  • What is the role of DNA in cells?
    DNA contains genetic material composed of nucleotides that act as a template to code for proteins, which are essential tools for cellular function.
  • Describe the process of Gene Expression.
    Gene expression is the process where DNA is transcribed into mRNA, which is then translated into a chain of amino acids that fold into functional proteins.
  • What is the significance of the universality of the genetic code?
    The universality of the genetic code across species is strong evidence that all life is related through common ancestry.
  • Define Producer and Consumer in an ecosystem.
    Producers obtain energy from sunlight and convert it into chemical energy via photosynthesis. Consumers obtain energy by feeding on other organisms.
  • How does energy flow through an ecosystem?
    Energy flows one-way from sunlight to producers (photosynthesis) to consumers, with most energy lost as heat at each transfer.
  • What is the role of decomposers in ecosystems?
    Decomposers break down dead organisms, returning nutrients to the soil, enabling nutrient cycling within ecosystems.
  • What are the Three Domains of life?
    The three domains are Bacteria, Archaea, and Eukarya, with Eukarya including kingdoms Protista, Fungi, Plantae, and Animalia.
  • Explain Darwin's concept of Natural Selection.
    Natural selection is the process where individuals with heritable traits better suited to their environment survive and reproduce more successfully.
  • What are the three observations that led Darwin to Natural Selection?
    1) Variation in heritable traits. 2) Overproduction of offspring leading to competition. 3) Adaptation of species to their environment.
  • Define Fitness in evolutionary terms.
    Fitness is an organism's contribution to the next generation's gene pool through survival and reproduction.
  • What is a scientific Hypothesis?
    A hypothesis is a testable explanation based on observations that leads to predictions and can be tested by experiments.
  • Difference between Independent and Dependent variables in an experiment?
    The independent variable is manipulated by the researcher; the dependent variable is the measured outcome affected by the manipulation.
  • What is the camouflage hypothesis tested in the mouse study?
    Mouse coloration evolved as an adaptation to protect them from predation by matching their environment for camouflage.
  • What were the control and experimental groups in the mouse camouflage experiment?
    Control: mouse models matching native habitat coloration. Experimental: mouse models with non-native coloration for the habitat.
  • What were the results of the mouse camouflage experiment?
    Camouflaged models had significantly lower predation rates than non-camouflaged models in both beach and inland habitats.
  • What is Homeostasis in living organisms?
    Homeostasis is the ability of an organism to maintain a stable internal environment despite external changes.
  • Define Biogenesis and Spontaneous Generation.
    Biogenesis: life arises only from existing life. Spontaneous generation: disproven idea that life arises from non-living matter.
  • What is the significance of phylogenetic trees?
    Phylogenetic trees graphically represent evolutionary relationships and common ancestry among species.
  • What is Systems Biology?
    Systems biology studies complex interactions within biological systems by constructing models to predict effects of changes.
  • What is the role of scientific inquiry in biology?
    Scientific inquiry involves making observations, forming hypotheses, and testing them through controlled experiments.
  • What is the difference between inductive and deductive reasoning?
    Inductive reasoning derives general principles from specific observations; deductive reasoning applies general principles to predict specific outcomes.
  • What is the importance of feedback mechanisms in organisms?
    Feedback mechanisms regulate growth, reproduction, and homeostasis by responding to internal and external environmental changes.
  • What is Genomics?
    Genomics is the study of an organism's entire set of genes (genome) and their interactions.
  • What is Bioinformatics?
    Bioinformatics uses computational tools to organize and analyze large volumes of biological data from high-throughput technologies.