Biology Flashcards: Identify Evidence For Evolution

What this deck covers

This deck focuses on Identify Evidence For Evolution, giving you a quick way to review the definitions, rules, and examples that matter most for Biology.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Which evidence category compares body structures across species to infer relatedness?

Answer: Comparative anatomy. Structural similarities reveal evolutionary relationships between species.

Flashcard 2: Which evidence type most directly supports that all life shares the same genetic code?

Answer: Molecular evidence (universal genetic code). Shared genetic code indicates common origin of all life.

Flashcard 3: Which evidence type is shown when the same basic limb bones appear in many tetrapods?

Answer: Homology indicating common ancestry. Same basic structure indicates inheritance from common ancestor.

Flashcard 4: On a phylogenetic tree, what does a node (branch point) represent?

Answer: The most recent common ancestor of descendant lineages. Branch points show where lineages diverged from ancestors.

Flashcard 5: Which broad evidence category uses preserved remains or traces to infer evolutionary change?

Answer: The fossil record. Fossils document evolutionary changes through geological time.

Flashcard 6: What is the principle that lower rock layers are generally older than higher layers?

Answer: Law of superposition. Foundation principle for determining relative ages in geology.

Flashcard 7: What is the term for rapid diversification from a common ancestor into many niches?

Answer: Adaptive radiation. Quick diversification when new environments become available.

Flashcard 8: Identify the evidence type: embryos of fish, birds, and mammals share early pharyngeal arches.

Answer: Comparative embryology. Similar early development indicates shared evolutionary origin.

Flashcard 9: Which evidence category compares body structures across species to infer relatedness?

Answer: Comparative anatomy. Structural similarities reveal evolutionary relationships between species.

Flashcard 10: Identify the evidence type: finches on different Galápagos islands have different beaks.

Answer: Biogeography with adaptive radiation. Different environments drove adaptive divergence from common ancestor.

Flashcard 11: Identify the evidence type: fossils show horses becoming larger with fewer toes over time.

Answer: Fossil record showing transitional change. Time sequence shows gradual evolutionary transformation.

Flashcard 12: What is meant by a "line of evidence" for evolution in biology?

Answer: An observation type that supports descent with modification. Provides observable data supporting the theory of common descent.

Flashcard 13: Which evolutionary pattern is supported by analogous structures in unrelated lineages?

Answer: Convergent evolution. Independent evolution of similar traits in different lineages.

Flashcard 14: Which evidence category uses the geographic distribution of species to support evolution?

Answer: Biogeography. Geographic patterns reflect evolutionary history and dispersal.

Flashcard 15: What is the key embryology observation that supports common ancestry among vertebrates?

Answer: Similar early developmental features across species. Shared developmental patterns indicate common evolutionary origin.

Flashcard 16: What is an example of observed evolution commonly tested in insects?

Answer: Pesticide resistance evolution. Selection pressure driving rapid evolutionary adaptation.

Flashcard 17: Identify the evidence type: a lineage splits after a geographic barrier forms (new river canyon).

Answer: Biogeography consistent with allopatric speciation. Geographic separation leads to reproductive isolation and speciation.

Flashcard 18: What is a vestigial structure?

Answer: A reduced remnant of a structure inherited from ancestors. Evolutionary remnant no longer serving its original function.

Flashcard 19: What biogeography pattern strongly supports evolution on islands?

Answer: Endemism: many species found only on that island group. Isolation promotes unique evolutionary adaptations and speciation.

Flashcard 20: What is the definition of common ancestry as used in evolutionary biology?

Answer: Different species share an ancestral population in the past. Fundamental concept explaining shared traits across species.

Flashcard 21: What is a shared derived character (synapomorphy) used for in evolution studies?

Answer: To define clades and infer evolutionary relationships. Defines monophyletic groups and evolutionary relationships.

Flashcard 22: Identify the evidence type: a bacterial population evolves resistance after antibiotic exposure.

Answer: Direct observation of evolution by natural selection. Real-time observation of evolutionary change in response to selection.

Flashcard 23: What is the definition of common ancestry as used in evolutionary biology?

Answer: Different species share an ancestral population in the past. Fundamental concept explaining shared traits across species.

Flashcard 24: Identify the evidence type: finches on different Galápagos islands have different beaks.

Answer: Biogeography with adaptive radiation. Different environments drove adaptive divergence from common ancestor.

Flashcard 25: Which term describes evolution driven by differential survival and reproduction in nature?

Answer: Natural selection. Environmental pressures drive adaptive evolutionary change.

Flashcard 26: Which evidence type most directly supports that all life shares the same genetic code?

Answer: Molecular evidence (universal genetic code). Shared genetic code indicates common origin of all life.

Flashcard 27: What is the term for fossils that show intermediate traits between major groups?

Answer: Transitional fossils. Bridge species connecting ancestral and derived forms.

Flashcard 28: Which evidence type is shown when unrelated desert plants evolve similar succulent forms?

Answer: Convergent evolution (analogous traits). Similar environments select for similar adaptive solutions.

Flashcard 29: Which evidence category compares early developmental stages to infer ancestry?

Answer: Comparative embryology. Early development reflects evolutionary history and relationships.

Flashcard 30: Which line of evidence most directly connects evolutionary theory to measurable allele changes?

Answer: Observed evolution (changes in allele frequencies in populations). Direct measurement of evolution at the genetic level.

Flashcard 31: Identify the evidence type: human tailbone (coccyx) as a reduced remnant of an ancestral tail.

Answer: Vestigial structure. Reduced ancestral structure no longer serving original function.

Flashcard 32: Which evidence type uses selective breeding to show that populations can change over generations?

Answer: Artificial selection. Demonstrates heritable variation can produce dramatic changes.

Flashcard 33: Identify the evidence type: similar forelimb bone pattern in human, bat, and whale.

Answer: Homologous structures (comparative anatomy). Same bone pattern indicates shared evolutionary origin.

Flashcard 34: Identify the evidence type: matching DNA sequences used to build a phylogenetic tree.

Answer: Molecular genetics supporting phylogeny. Genetic data used to reconstruct evolutionary relationships.

Flashcard 35: Which evidence category is direct observation of evolutionary change in real time?

Answer: Observed evolution in contemporary populations. Real-time documentation of evolutionary processes in action.

Flashcard 36: Identify the evidence type: pelvic bones in whales that do not support hind limbs.

Answer: Vestigial structures. Reduced structures inherited from ancestors with different lifestyles.

Flashcard 37: Which diagram type is used to represent hypotheses of evolutionary relationships?

Answer: Phylogenetic tree (cladogram). Visual representation of hypothesized evolutionary relationships.

Flashcard 38: On a phylogenetic tree, what does a clade represent?

Answer: An ancestor and all of its descendants. Monophyletic group sharing common evolutionary history.

Flashcard 39: Which evidence type uses shared derived traits to group organisms on a cladogram?

Answer: Cladistics based on shared derived characters. Shared derived traits define evolutionary relationships.

Flashcard 40: What is a pseudogene in the context of evolutionary evidence?

Answer: A nonfunctional gene remnant inherited from ancestors. Molecular fossil providing evidence of evolutionary history.

Flashcard 41: What is an analogous structure?

Answer: A similar function structure evolved independently (no recent common ancestry). Similar environmental pressures produce similar solutions independently.

Flashcard 42: Identify the evidence type: fossils show horses becoming larger with fewer toes over time.

Answer: Fossil record showing transitional change. Time sequence shows gradual evolutionary transformation.

Flashcard 43: Which evidence type is shown by the ordered appearance of forms in older to younger rock layers?

Answer: Fossil succession in stratigraphy. Shows evolutionary progression from simple to complex forms over time.

Flashcard 44: Which evidence type is shown when the same basic limb bones appear in many tetrapods?

Answer: Homology indicating common ancestry. Same basic structure indicates inheritance from common ancestor.

Flashcard 45: Identify the evidence type: similar mitochondrial DNA indicates close relatedness.

Answer: Molecular evidence (mtDNA similarity). Maternal inheritance patterns reveal evolutionary relationships.

Flashcard 46: Which evidence category compares early developmental stages to infer ancestry?

Answer: Comparative embryology. Early development reflects evolutionary history and relationships.

Flashcard 47: Which evidence type is shown by the ordered appearance of forms in older to younger rock layers?

Answer: Fossil succession in stratigraphy. Shows evolutionary progression from simple to complex forms over time.

Flashcard 48: What is an example of observed evolution commonly tested in bacteria?

Answer: Antibiotic resistance evolution. Natural selection producing rapid evolutionary change.

Flashcard 49: Which evidence type is indicated when island species resemble the nearest mainland species?

Answer: Biogeography supporting colonization and divergence. Geographic proximity indicates source of colonizing ancestors.

Flashcard 50: Identify the evidence type: pelvic bones in whales that do not support hind limbs.

Answer: Vestigial structures. Reduced structures inherited from ancestors with different lifestyles.

Flashcard 51: Which molecular feature is a shared DNA insertion at the same genome location in two species?

Answer: Shared pseudogene or shared retroviral insertion. Unlikely coincidence strongly supports common ancestry.

Flashcard 52: Which dating method uses radioactive decay to assign absolute ages to rocks and fossils?

Answer: Radiometric dating. Uses decay rates to determine precise geological ages.

Flashcard 53: Which evidence type is indicated when island species resemble the nearest mainland species?

Answer: Biogeography supporting colonization and divergence. Geographic proximity indicates source of colonizing ancestors.

Flashcard 54: Which evidence category uses the geographic distribution of species to support evolution?

Answer: Biogeography. Geographic patterns reflect evolutionary history and dispersal.

Flashcard 55: Which evidence type is supported by the presence of ERV sequences shared by primates?

Answer: Shared retroviral insertions (molecular evidence). Shared viral DNA insertions indicate common evolutionary history.

Flashcard 56: Which evidence category uses DNA or protein sequence similarity to infer relatedness?

Answer: Molecular (genetic) evidence. DNA/protein similarities quantify evolutionary relationships precisely.

Flashcard 57: Which evidence type uses selective breeding to show that populations can change over generations?

Answer: Artificial selection. Demonstrates heritable variation can produce dramatic changes.

Flashcard 58: Which evidence type is supported when multiple independent datasets produce the same tree pattern?

Answer: Consilience of evidence for common descent. Multiple independent methods producing consistent evolutionary trees.

Flashcard 59: Which line of evidence most directly connects evolutionary theory to measurable allele changes?

Answer: Observed evolution (changes in allele frequencies in populations). Direct measurement of evolution at the genetic level.

Flashcard 60: Which geological process helps explain related species on now-separated continents?

Answer: Plate tectonics (continental drift). Continental movement explains current species distribution patterns.

Flashcard 61: What is the key embryology observation that supports common ancestry among vertebrates?

Answer: Similar early developmental features across species. Shared developmental patterns indicate common evolutionary origin.

Flashcard 62: Which evolutionary pattern is supported when one ancestral species splits into many forms?

Answer: Divergent evolution. Adaptive radiation from single ancestral species into multiple forms.

Flashcard 63: On a phylogenetic tree, what does a node (branch point) represent?

Answer: The most recent common ancestor of descendant lineages. Branch points show where lineages diverged from ancestors.

Flashcard 64: Which evidence type uses shared derived traits to group organisms on a cladogram?

Answer: Cladistics based on shared derived characters. Shared derived traits define evolutionary relationships.

Flashcard 65: Which dating method uses radioactive decay to assign absolute ages to rocks and fossils?

Answer: Radiometric dating. Uses decay rates to determine precise geological ages.

Flashcard 66: Identify the evidence type: a sequence of fossils documents whales transitioning from land to sea.

Answer: Transitional fossils in the fossil record. Fossil sequence documents major evolutionary transition.

Flashcard 67: Which geological process helps explain related species on now-separated continents?

Answer: Plate tectonics (continental drift). Continental movement explains current species distribution patterns.

Flashcard 68: What is a homologous structure?

Answer: A shared structure from common ancestry with possible different function. Same bone pattern indicates inheritance from common ancestor.

Flashcard 69: Identify the evidence type: marsupials concentrated in Australia with related forms nearby.

Answer: Biogeography. Geographic isolation led to unique evolutionary adaptations.

Flashcard 70: What is the term for rapid diversification from a common ancestor into many niches?

Answer: Adaptive radiation. Quick diversification when new environments become available.

Flashcard 71: Which evidence type is supported when multiple species share the same conserved Hox genes?

Answer: Molecular and developmental genetics evidence. Conserved developmental genes indicate deep evolutionary relationships.

Flashcard 72: Identify the evidence type: embryos of fish, birds, and mammals share early pharyngeal arches.

Answer: Comparative embryology. Similar early development indicates shared evolutionary origin.

Flashcard 73: What is a pseudogene in the context of evolutionary evidence?

Answer: A nonfunctional gene remnant inherited from ancestors. Molecular fossil providing evidence of evolutionary history.

Flashcard 74: What is the term for the time required for half of a radioactive isotope to decay?

Answer: Half-life. Constant rate measure used in radiometric dating calculations.

Flashcard 75: Which evidence type is supported when multiple species share the same conserved Hox genes?

Answer: Molecular and developmental genetics evidence. Conserved developmental genes indicate deep evolutionary relationships.

Flashcard 76: What is an example of observed evolution commonly tested in bacteria?

Answer: Antibiotic resistance evolution. Natural selection producing rapid evolutionary change.

Flashcard 77: Which evidence category is direct observation of evolutionary change in real time?

Answer: Observed evolution in contemporary populations. Real-time documentation of evolutionary processes in action.

Flashcard 78: Which evolutionary pattern is supported by analogous structures in unrelated lineages?

Answer: Convergent evolution. Independent evolution of similar traits in different lineages.

Flashcard 79: Which evidence category uses DNA or protein sequence similarity to infer relatedness?

Answer: Molecular (genetic) evidence. DNA/protein similarities quantify evolutionary relationships precisely.

Flashcard 80: What is the principle that lower rock layers are generally older than higher layers?

Answer: Law of superposition. Foundation principle for determining relative ages in geology.

Flashcard 81: What is a vestigial structure?

Answer: A reduced remnant of a structure inherited from ancestors. Evolutionary remnant no longer serving its original function.

Flashcard 82: What is the term for fossils that show intermediate traits between major groups?

Answer: Transitional fossils. Bridge species connecting ancestral and derived forms.

Flashcard 83: Identify the evidence type: a bacterial population evolves resistance after antibiotic exposure.

Answer: Direct observation of evolution by natural selection. Real-time observation of evolutionary change in response to selection.

Flashcard 84: Identify the evidence type: a lineage splits after a geographic barrier forms (new river canyon).

Answer: Biogeography consistent with allopatric speciation. Geographic separation leads to reproductive isolation and speciation.

Flashcard 85: Which line of evidence best supports that birds and dinosaurs share a common ancestor?

Answer: Transitional fossils (for example, feathered dinosaur fossils). Intermediate forms document evolutionary transition between major groups.

Flashcard 86: What does high DNA sequence similarity between two species most directly indicate?

Answer: A more recent common ancestor. More similar sequences indicate more recent divergence.

Flashcard 87: Identify the evidence type: human tailbone (coccyx) as a reduced remnant of an ancestral tail.

Answer: Vestigial structure. Reduced ancestral structure no longer serving original function.

Flashcard 88: Which evidence type is supported when multiple independent datasets produce the same tree pattern?

Answer: Consilience of evidence for common descent. Multiple independent methods producing consistent evolutionary trees.

Flashcard 89: Identify the evidence type: dog breeds produced by humans selecting desired traits.

Answer: Artificial selection. Human selection demonstrates mechanism of evolutionary change.

Flashcard 90: Identify the evidence type: wings in birds and insects share function but not structure origin.

Answer: Analogous structures (convergent evolution). Similar function evolved independently in separate lineages.

Flashcard 91: Identify the evidence type: two species share a disabled vitamin C gene at the same locus.

Answer: Shared pseudogene (molecular evidence). Shared non-functional genes indicate common ancestry.

Flashcard 92: Which evidence category includes similarities in ribosomal RNA sequences across all organisms?

Answer: Molecular (genetic) evidence. Highly conserved sequences indicate deep evolutionary relationships.

Flashcard 93: Identify the evidence type: similar mitochondrial DNA indicates close relatedness.

Answer: Molecular evidence (mtDNA similarity). Maternal inheritance patterns reveal evolutionary relationships.

Flashcard 94: On a phylogenetic tree, what does a clade represent?

Answer: An ancestor and all of its descendants. Monophyletic group sharing common evolutionary history.

Flashcard 95: What is the term for the time required for half of a radioactive isotope to decay?

Answer: Half-life. Constant rate measure used in radiometric dating calculations.

Flashcard 96: Which evolutionary pattern is supported when one ancestral species splits into many forms?

Answer: Divergent evolution. Adaptive radiation from single ancestral species into multiple forms.

Flashcard 97: What does high DNA sequence similarity between two species most directly indicate?

Answer: A more recent common ancestor. More similar sequences indicate more recent divergence.

Flashcard 98: Which evidence type is shown when unrelated desert plants evolve similar succulent forms?

Answer: Convergent evolution (analogous traits). Similar environments select for similar adaptive solutions.

Flashcard 99: Which line of evidence best supports that birds and dinosaurs share a common ancestor?

Answer: Transitional fossils (for example, feathered dinosaur fossils). Intermediate forms document evolutionary transition between major groups.

Flashcard 100: Identify the evidence type: marsupials concentrated in Australia with related forms nearby.

Answer: Biogeography. Geographic isolation led to unique evolutionary adaptations.