Evolution Theories and Origin of Life Quiz
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What is the main difference between the theories of evolution proposed by Lamarck and Darwin?

  • Lamarck believed that evolution is driven by the interaction between organisms and their environment, while Darwin proposed that evolution is driven by random mutations.
  • Lamarck believed that evolution is driven by a gradual process of change, while Darwin proposed that evolution occurs in sudden jumps.
  • Lamarck believed that evolution is driven by the environment, while Darwin proposed that evolution is driven by the organism itself.
  • Lamarck believed that evolution is driven by the inheritance of acquired characteristics, while Darwin proposed that evolution is driven by natural selection. (correct)
  • Based on the geological time scale, which period saw the emergence of land colonization by organisms?

  • Archean
  • Proterozoic
  • Mesozoic
  • Paleozoic (correct)
  • What was the primary observation that Darwin made about the finches on the Galapagos Islands that contributed to the development of his theory of evolution?

  • The finches on different islands had different mating rituals that were adapted to their specific social structures.
  • The finches on different islands had different nesting behaviors that were adapted to their specific predator threats.
  • The finches on different islands had different migration patterns that were adapted to their specific climate conditions.
  • The finches on different islands had different beak shapes that were adapted to their specific food sources. (correct)
  • How does the concept of uniformitarianism, as proposed by geologists in the 1800s, support Darwin's theory of evolution?

    <p>It suggests that the Earth is much older than previously believed, providing ample time for evolutionary change to occur. (C)</p> Signup and view all the answers

    What key difference between the theories of Lamarck and Darwin explains the differences in the evolution of the Galapagos finches?

    <p>Darwin emphasized the role of variation within a population, while Lamarck suggested that traits acquired during the lifetime of an organism could be passed on to its offspring. (D)</p> Signup and view all the answers

    Which of the following hypotheses proposes that organic molecules were delivered to Earth from space?

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

    Which of the following is NOT a characteristic that distinguishes life from non-life?

    <p>The ability to crystallize and form intricate structures (B)</p> Signup and view all the answers

    In the context of the early Earth, what does the term 'prebiotic soup' refer to?

    <p>A rich broth of organic molecules formed before the emergence of life (D)</p> Signup and view all the answers

    Which stage in the origins of life involves the formation of DNA, RNA, and proteins from smaller molecules?

    <p>Stage 2: Polymerization of Organic Molecules (D)</p> Signup and view all the answers

    Why is the Miller-Urey experiment considered significant in understanding the origins of life?

    <p>It demonstrated that organic molecules can be spontaneously formed from inorganic precursors (B)</p> Signup and view all the answers

    What is the primary reason for using maggots in maggot therapy for non-healing wounds?

    <p>Maggots consume dead tissue, aiding in wound cleaning (A)</p> Signup and view all the answers

    Which of the following correctly orders the eras in Earth's history from oldest to youngest?

    <p>Archaen → Proterozoic → Phanerozoic → Cenozoic (A)</p> Signup and view all the answers

    Which period is characterized by the first appearance of seed plants?

    <p>Devonian (B)</p> Signup and view all the answers

    During which period did a mass extinction event eliminate more than 60% of marine invertebrate species?

    <p>Ordovician (B)</p> Signup and view all the answers

    What significant geological event occurred during the Permian period?

    <p>The formation of Pangaea (A)</p> Signup and view all the answers

    The evolution of which adaptation allowed reptiles to thrive in diverse environments?

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

    Which period witnessed the largest known mass extinction event?

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

    The emergence of "first vertebrates" is associated with which period?

    <p>Cambrian (B)</p> Signup and view all the answers

    What is the primary reason for the extensive coal deposits formed during the Carboniferous period?

    <p>Large, ancient forests (D)</p> Signup and view all the answers

    Which period is characterized by the dominance of amphibians and the emergence of reptiles?

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

    What event marked the end of the Triassic period?

    <p>Volcanic eruptions leading to mass extinctions (C)</p> Signup and view all the answers

    Which of the following describes the dominant land plants during the Jurassic period?

    <p>Gymnosperms (B)</p> Signup and view all the answers

    What critical role do clay surfaces play in the transition from prebiotic monomers to biological polymers?

    <p>Clay surfaces can serve as a template for the polymerization of organic monomers. This template is a preorganized surface onto which monomers can adsorb in an orientation that facilitates the formation of bonds between them. (A)</p> Signup and view all the answers

    What makes RNA a strong candidate for the first genetic material in early life forms?

    <p>RNA molecules possess the capacity to store genetic information, catalyze biochemical reactions, and self-replicate. (B)</p> Signup and view all the answers

    Which of the following statements best describes the evolutionary advantage of the transition from a hypothetical RNA world to a DNA-RNA-protein world?

    <p>All of the above are evolutionary advantages of the transition to a DNA-RNA-protein world. (D)</p> Signup and view all the answers

    What is the primary difference between the processes that contribute to the formation of coacervates and liposomes?

    <p>Coacervates are formed through the spontaneous association of charged molecules, while liposomes are formed through the self-assembly of lipid molecules. (A)</p> Signup and view all the answers

    What is the significance of the protobiont's ability to self-replicate in the context of the origins of life?

    <p>Self-replication allows the protobiont to pass on its genetic information to its offspring, leading to potential evolution. (B)</p> Signup and view all the answers

    What role do ribozymes play in the transition from a hypothetical RNA world to protein-based life?

    <p>Ribozymes act as catalysts for the synthesis of proteins, thus transitioning from an RNA-based metabolism to a protein-based metabolism. (A)</p> Signup and view all the answers

    Why is DNA considered a more stable and reliable storage molecule for genetic information compared to RNA?

    <p>All of the above statements accurately describe the stability and reliability of DNA as a genetic information storage molecule compared to RNA. (D)</p> Signup and view all the answers

    Which of the following is NOT a characteristic that distinguishes protobionts from truly living cells?

    <p>Protobionts are incapable of self-replication, which is a defining characteristic of living cells. (D)</p> Signup and view all the answers

    Which of the following best describes the role of lipids in the formation of protobionts and their potential relevance to the evolution of life?

    <p>Lipids form a boundary separating the internal environment from the external environment, creating a compartmentalized structure. (B)</p> Signup and view all the answers

    What is the primary reason why stromatolites are significant in the study of early life?

    <p>They provide evidence of the presence of oxygen-producing organisms in the Archaean eon. (A)</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between igneous rocks and the dating of rock layers?

    <p>Igneous rocks contain radioactive isotopes that decay at a predictable rate, allowing for the dating of the sedimentary layers they are in contact with. (A)</p> Signup and view all the answers

    Which of the following is NOT a consequence of environmental changes on living organisms?

    <p>The formation of new types of rocks. (C)</p> Signup and view all the answers

    Which of the following statements is FALSE regarding the evolution of multicellularity?

    <p>The evolution of multicellularity resulted in a decrease in the complexity and specialization of cells. (A)</p> Signup and view all the answers

    Based on the provided information, in which time period did the first prokaryotic cells emerge?

    <p>Archaean Eon (B)</p> Signup and view all the answers

    What is the fundamental difference between heterotrophs and autotrophs, as discussed in the context of early life?

    <p>Heterotrophs consume other organisms for energy while autotrophs produce their own energy through photosynthesis. (B)</p> Signup and view all the answers

    What is the significance of the emergence of eukaryotic cells in the evolution of life?

    <p>Eukaryotic cells allowed for the development of all multicellular organisms, increasing biodiversity. (B)</p> Signup and view all the answers

    What is the primary evidence for the endosymbiotic theory, which explains the origin of eukaryotic cells?

    <p>The presence of DNA in the nucleus, mitochondria, and chloroplasts, suggesting their independent origins. (A), The fact that mitochondria and chloroplasts can replicate independently within a eukaryotic cell. (D)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of the Proterozoic Eon?

    <p>The dominance of prokaryotes as the primary life form. (C)</p> Signup and view all the answers

    What is the significance of bilateral symmetry in the evolution of animals?

    <p>Bilateral symmetry allowed for the development of specialized appendages in animals, leading to increased mobility and efficient movement. (B)</p> Signup and view all the answers

    Flashcards

    Myiasis

    Invasion of tissue by fly larvae (maggots) that feed on living or dead tissue.

    Facultative Myiasis

    Maggots develop in foul-smelling wounds, especially those producing pus.

    Maggot Therapy

    The introduction of live, disinfected maggots into non-healing wounds for debridement.

    History of Earth

    Earth's timeline progresses from Archaen to Cenozoic over billions of years.

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    What is Life?

    Life is characterized by DNA, cells, metabolism, growth, reproduction, and evolution.

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    Origins of Life - Stages 1-4

    1. Formation of organic molecules, 2. Polymerization into DNA/RNA/proteins, 3. Membrane enclosure, 4. Acquisition of cellular properties.
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    Reducing Atmosphere Hypothesis

    The hypothesis that organic molecules formed under early Earth conditions, demonstrated by Miller-Urey's experiment.

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    Deep-sea Vent Hypothesis

    Molecules formed between hot vent water and cold oceans.

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    Prebiotic Polymer Synthesis

    Formation of polymers thought impossible in water due to hydrolysis.

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    Clay Surfaces

    Experiments show polymers form on clay, aiding prebiotic synthesis.

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    Protobionts

    Boundaries that separate internal polymers from environment.

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    Coacervates

    Droplets formed from association of charged molecules, could perform metabolic functions.

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    Liposomes

    Vesicles surrounded by a lipid layer that can enclose RNA.

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    RNA World

    Hypothesis that RNA was the first macromolecule in protobionts.

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    Functions of RNA

    RNA can store information, self-replicate, and have enzymatic functions.

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    Advantages of DNA/RNA

    DNA provides stable information; RNA performs diverse functions.

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    K-T Extinction

    Mass extinction event approximately 66 million years ago, likely caused by a meteorite impact.

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    Angiosperms

    The earliest flowering plants that became the dominant land plants after the dinosaurs.

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    Microevolution

    Changes in allele frequencies in a population over time, driving small adjustments within species.

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    Macroevolution

    The formation of new species or groups of related species, larger changes over long time periods.

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    Darwin's Observations

    Insights gained by Darwin during his voyage on the HMS Beagle, influencing his evolutionary theory.

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    Sedimentary Rock

    Rock formed by the accumulation of sediments, often containing fossils.

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    Igneous Rock

    Rock formed from cooled magma or lava, used in dating rock layers.

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    Metamorphic Rock

    Rock transformed by heat and pressure, changing its structure.

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    Stromatolites

    Fossilized layers of biofilms, indicating ancient life forms.

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    Archaean Period

    Time period (3.8-2.5 bya) when prokaryotic cells first appeared.

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    Proterozoic Period

    Time period (2.5 bya - 543 mya) when multicellular eukaryotes arose.

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    Eukaryotic cells

    Cells with a nucleus, including all multicellular organisms.

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    Autotrophs

    Organisms that produce their own energy, usually through photosynthesis.

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    Heterotrophs

    Organisms that obtain energy by consuming other organisms.

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    Endosymbiotic Theory

    The theory that eukaryotic cells originated from symbiotic relationships between prokaryotic cells.

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    Phanerozoic Eon

    The eon characterized by the emergence of abundant life forms, including land plants and animals.

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    Cambrian Explosion

    A rapid increase in the diversity of animal species during the Cambrian period.

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    Burgess Shale

    A fossil-rich formation known for preserving soft-bodied organisms from the Cambrian period.

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    Ordovician Extinction

    A mass extinction event near the end of the Ordovician period that eliminated over 60% of marine invertebrates.

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    Age of Fish

    The Devonian period, noted for the dominance and diversity of fish species.

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    Carboniferous Period

    A period that saw the formation of extensive coal deposits and the rise of amphibians and large trees.

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    Pangaea

    The supercontinent formed during the Permian period as a result of continental drift.

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    Great Dying

    The largest mass extinction event during the Permian period, eliminating up to 95% of species.

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    Triassic Period

    The period marked by the rise of dinosaurs and the first true mammals.

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    Jurassic Period

    A period where dinosaurs were the dominant land animals and the first birds appeared.

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    Study Notes

    Myiasis

    • Invasion of tissue by fly larvae (maggots)
    • Feeding on living or dead tissue
    • Facultative myiasis: maggots develop in foul-smelling wounds (especially pus-producing wounds)
    • Maggot therapy: live (disinfected) maggots introduced into non-healing wounds to clean out necrotic tissue (debridement)

    History of Earth

    • Archaen → Proterozoic → Phanerozoic → Cenozoic
    • 13.8 billion years ago - Big Bang
    • 4.6 billion years ago - Start of solar system
    • 4.55 billion years ago - Origin of Earth
    • 4 to 3.5 billion years ago - Origins of life (cooling of Earth, formation of crust and oceans)

    What is Life?

    • DNA, cells, metabolism, adaptation, homeostasis, growth, reproduction and evolution.
    • Metabolism:
      • Absorption of nutrients.
      • Excretion of wastes.
      • Energy acquisition and transformation (e.g., Krebs cycle).
      • Cellular synthesis.
    • Reproduction:
      • Growth: duplication of all cellular components.
      • Division of discrete units (cells).
    • Evolution:
      • Variation, reproduction, mutation
      • Mutation: mistakes in copying cell components

    Origins of Life: Stages 1-4

    • Stage 1: Organic molecules (nucleotides and amino acids) produced prior to cells.
    • Stage 2: Nucleotides and amino acids polymerized to form DNA, RNA and proteins.
    • Stage 3: Polymers enclosed in membranes.
    • Stage 4: Polymers enclosed in membranes acquire cellular properties.

    Origin of Organic Molecules

    • Reducing Atmosphere Hypothesis: Early Earth atmosphere conditions and electrical discharge produced organic compounds.
    • Extraterrestrial Hypothesis: Organic compounds delivered to Earth by meteorites.
    • Deep Sea Vent Hypothesis: Organic compounds formed in the temperature gradient between extremely hot vent water and cold ocean water.

    Stage 2: Organic Polymers

    • Experimentally, prebiotic synthesis of polymers (nucleic acids and polypeptides) occurs on clay surfaces. Hydrolysis competes with polymerization in solution.

    Stage 3: Formation of Boundaries

    • Protobionts (precursors to living cells) form boundaries – aggregate of molecules/macromolecules that maintain an internal chemical environment distinct from the surroundings using lipid bilayers.

    RNA World

    • RNA is a first macromolecule in protobionts.
    • RNA functions in storing information, self-replication and enzyme function.
    • Advantages of DNA, RNA, protein world: information storage (DNA), metabolism (proteins).

    Origins of Life Summary

    • Formation/accumulation of organic molecules.
    • Polymerization of nucleic acids & proteins.
    • Formation of protobionts
    • Synthesis of cell components by ribozymes
    • Synthesis of proteins by DNA, RNA, & ribosomes
    • Replication of DNA

    Fossils and Types of Rock

    • Sedimentary rocks contain fossils.
    • Igneous rocks are used to date rock layers.
    • Radioactive isotopes in rocks allow dating rocks and measure extinct time.

    Changes in Living Organisms

    • Changes in climate, atmosphere, landmasses, floods etc.
    • Living organisms can adapt to changes and allow for new types of organisms.
    • Responsible for many extinctions.

    Time Periods (Timeline)

    • Archaean (3.8-2.5 bya):
      • First cells (prokaryotic).
      • Anaerobic organisms.
      • Heterotrophs (energy from consumption).
    • Proterozoic (2.5 bya - 543 mya):
      • Multicellular eukaryotes arise.
      • Possible origins: colony formation, single cells staying stuck together.

    Phanerozoic Eon - Diversification

    • Diversification of invertebrates and colonization of land plants and animals.
    • Cambrian (543–490 mya):
      • Abrupt increase in marine invertebrate diversity
    • Ordovician:
      • Diverse group of marine invertebrates (trilobites, brachiopods).
      • Primitive land plants and arthropods invade land, mass extinction at end.
    • Silurian:
      • Coral reefs appear.
      • Colonization by terrestrial plants and animals (spiders and centipedes).
    • Devonian:
      • Ferns, horsetails, seed plants appear.
      • Insects, tetrapods (amphibians) emerge.
    • Carboniferous:
      • Rich coal deposits formed.
      • Large plants, trees, amphibians present.
      • First flying insects.
      • Amniotic egg emerges.
    • Permian:
      • Pangaea (continent formed).
      • Amphibians, reptiles became dominant.
      • Mammals-like reptiles appeared.
    • Triassic:
      • Many reptiles.
      • First dinosaurs and mammals, gymnosperms (non-flowering plants) dominate.
    • Jurassic:
      • Gymnosperms dominate.
      • Dinosaurs dominate.
      • First known birds appear.
    • Cretaceous:
      • Dinosaurs still dominant, earliest flowering plants (angiosperms).
      • Mass extinction at end (K-T extinction).
    • Tertiary:
      • Mammals diversified rapidly, angiosperms dominate.

    Lecture 5 - Introduction to Evolution

    • Evolution: Heritable change in one or more characteristics of a population through generations.
    • Microevolution: Changes in allele frequencies in a population over time.
    • Macroevolution: Formation of new species/groups of related species.
    • Theory: Comprehensive explanation for a large body of information.

    Darwin's Influences and HMS Beagle

    • Uniformitarism: time required for Earth's geological changes.
    • Slow geological processes lead to substantial change.
    • Population growth linked to limited resources.
    • Darwin's observations on animals and plants on his voyage influenced his theory.

    Darwin's Formulation of Theory

    • Mid-1840s: Darwin formulated his theory.
    • 1858: Alfred Wallace also developed similar theory; papers published together.
    • 1859: Darwin's "The Origin of Species" published.

    Descent with Modification

    • Variation within a species; heritable traits.
    • More offspring produced than can survive; competition for resources.
    • Traits favoring reproductive success become more common.

    Fossils (Transitional Forms)

    • Fossils document evolutionary changes.

    Biogeography

    • The study of the geographical distribution of extinct/living species.
    • Isolated continents and islands have unique plant and animal communities.
    • Convergent evolution: similar characteristics from different lineages.

    Selective Breeding (Artificial Selection)

    • Programs/procedures to modify traits in domesticated species.
    • Breeders chose desirable phenotypes (e.g., leg-length, size, hairiness).

    Homology - Anatomical, Developmental, Molecular

    • Fundamental similarity due to descent from a common ancestor.
    • Similar structures may have different functions.
    • Species from different lineages sharing similar structures.

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    Description

    Test your knowledge on the fundamental differences between Lamarck's and Darwin's theories of evolution, and explore the geological time scale regarding land colonization. Additionally, dive into the concepts that relate to the origins of life, including the prebiotic soup and key stages in biogenesis.

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