뒤로General Biology: Evolution, Diversity, and the Function of Life – Comprehensive Study Notes
스터디 가이드 - 스마트 노트
자료에 맞춘 맞춤형 노트, 핵심 정의, 예시, 맥락을 확장해 제공합니다.
{"type":"doc","content":[{"type":"heading","attrs":{"textAlign":null,"level":2},"content":[{"type":"text","text":"Chapter 19: Descent With Modification"}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Descent with Modification and Evolution"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Descent with modification refers to the process by which organisms inherit traits from their ancestors, but populations gradually change over generations. This concept is central to understanding evolution, which is the change in inherited characteristics or allele frequencies of a population over generations."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Descent with modification:"},{"type":"text","text":" Modern species descended from earlier ancestral species, accumulating changes over time."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Evolution:"},{"type":"text","text":" Populations, not individuals, evolve as their genetic makeup changes across generations."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Adaptation and Artificial Selection"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Adaptation:"},{"type":"text","text":" An inherited trait that improves an organism’s ability to survive and reproduce in a specific environment. Adaptation also refers to the evolutionary process by which beneficial traits become more common."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Artificial selection:"},{"type":"text","text":" Humans select organisms with desirable traits to reproduce, leading to significant changes over generations (e.g., dog breeds, crop varieties)."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Evidence for Evolution"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Direct observations:"},{"type":"text","text":" Examples include antibiotic resistance in bacteria and changes in finch beak size."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Homology:"},{"type":"text","text":" Similar anatomical structures due to shared ancestry (e.g., human arm, whale flipper, bat wing)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Fossil record:"},{"type":"text","text":" Shows changes in organisms over time and the existence of extinct species, including transitional forms."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Biogeography:"},{"type":"text","text":" The geographic distribution of species supports common ancestry and evolutionary divergence."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":2},"content":[{"type":"text","text":"Chapter 20: Phylogeny"}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Phylogeny and Phylogenetic Trees"}]},{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Phylogeny is the evolutionary history and relationships among organisms, often depicted as a phylogenetic tree—a branching diagram showing proposed evolutionary relationships."}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Root:"},{"type":"text","text":" Oldest common ancestor of all organisms on the tree."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Branch:"},{"type":"text","text":" Represents an evolutionary lineage."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Node (branch point):"},{"type":"text","text":" Common ancestor where one lineage splits into two or more."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Tip:"},{"type":"text","text":" Represents a species or group being studied."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Clade:"},{"type":"text","text":" An ancestor and all its descendants (monophyletic group)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Basal taxon:"},{"type":"text","text":" A lineage that diverged early in the group’s history."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Homologous vs. Analogous Traits"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Homologous traits:"},{"type":"text","text":" Similar due to common ancestry (e.g., human arm and whale flipper)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Analogous traits:"},{"type":"text","text":" Similar in function but evolved independently (e.g., bird wings and insect wings); result from convergent evolution."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Classification of Groups"}]},{"type":"table","content":[{"type":"tableRow","content":[{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Group Type"}]}]},{"type":"tableHeader","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Definition"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Monophyletic"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Includes an ancestor and all its descendants"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Paraphyletic"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Includes an ancestor but not all descendants"}]}]}]},{"type":"tableRow","content":[{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Polyphyletic"}]}]},{"type":"tableCell","attrs":{"colspan":1,"rowspan":1,"colwidth":null},"content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Includes organisms from different ancestors, excluding their most recent common ancestor"}]}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Characters and Parsimony"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Shared ancestral character:"},{"type":"text","text":" Trait that originated before the group being studied."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Shared derived character:"},{"type":"text","text":" New trait that evolved in the group’s recent common ancestor; helps identify clades."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Maximum parsimony:"},{"type":"text","text":" The simplest evolutionary tree requiring the fewest changes is preferred."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Molecular Clocks"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Estimate divergence times using DNA or protein differences, assuming a relatively constant mutation rate."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":2},"content":[{"type":"text","text":"Chapter 21: Evolution of Populations"}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Genetic Variation"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Genetic variation:"},{"type":"text","text":" Differences in DNA, genes, or alleles among individuals in a population (e.g., height, eye color, disease resistance)."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","text":"Essential for natural selection to act upon."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Sources of Genetic Variation"}]},{"type":"bulletList","content":[{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Mutation:"},{"type":"text","text":" Random changes in DNA that create new alleles."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Sexual reproduction:"},{"type":"text","text":" Creates new allele combinations via crossing over, independent assortment, and random fertilization."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Gene 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small group; may have different allele frequencies."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Bottleneck effect:"},{"type":"text","text":" Population size drastically reduced, decreasing genetic variation."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Gene flow:"},{"type":"text","text":" Migration introduces new alleles, making populations more similar."}]}]},{"type":"listItem","content":[{"type":"paragraph","attrs":{"textAlign":null},"content":[{"type":"text","marks":[{"type":"bold"}],"text":"Mutation:"},{"type":"text","text":" Source of new alleles, not directed by need."}]}]}]},{"type":"heading","attrs":{"textAlign":null,"level":3},"content":[{"type":"text","text":"Types of 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