🌳 Evolutionary Biology: One Night Revision & Cram Sheet
Explain how populations change in genetic composition, how that change produces adaptation and species, and how the nested history of life is read from anatomy, fossils, geography, and molecules. Separate the fact that populations change from the several processes that cause the change, and separate a tested claim from a story told after the fact.
🌟 Core Axioms & High-Yield Golden Rules
8 Core PrinciplesNon-negotiable foundational truths frequently tested in direct conceptual and numerical exam questions. Click checkbox to mark as mastered.
History of the idea: Key focus includes Fixity, Lamarck, Darwin and Wallace. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 1 Priority FocusEvidence for evolution: Key focus includes Homology and convergence, vestiges, fossils. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 2 Priority FocusNatural selection: Key focus includes Conditions and fitness, modes, sexual selection. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 3 Priority FocusVariation and its fate: Key focus includes Sources, standing variation, Hardy–Weinberg. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 4 Priority FocusDrift, flow, and non-random mating: Key focus includes Wright–Fisher, effective size, migration. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 5 Priority FocusSelection in populations: Key focus includes Dominance and hiding, mutation–selection balance, sweeps. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 6 Priority FocusSpecies and speciation: Key focus includes Species concepts, allopatry and sympatry, isolating mechanisms. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 7 Priority FocusPhylogeny: Key focus includes Tree parts, monophyly, synapomorphy. Understand fundamental structures, metabolic pathways, and regulatory feedback loops.
💡 Chapter 8 Priority Focus📚 Chapter-by-Chapter Rapid Cram Breakdown
11 ModulesHigh-density review of every curriculum chapter. Click any chapter title to view full in-depth lecture notes.
History of the idea →
- Master Fixity: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Lamarck: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Darwin and Wallace: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master the modern synthesis: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master fact versus theory: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Evidence for evolution →
- Master Homology and convergence: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master vestiges: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master fossils: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master biogeography: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master direct observation: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Natural selection →
- Master Conditions and fitness: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master modes: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master sexual selection: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master adaptation and spandrels: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master kin selection: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Variation and its fate →
- Master Sources: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master standing variation: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Hardy–Weinberg: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master neutral theory: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master dN/dS: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Wright–Fisher: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master effective size: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master migration: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master inbreeding: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Dominance and hiding: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master mutation–selection balance: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master sweeps: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master frequency dependence: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Species and speciation →
- Master Species concepts: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master allopatry and sympatry: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master isolating mechanisms: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master ring species: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Phylogeny →
- Master Tree parts: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master monophyly: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master synapomorphy: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master gene trees and species trees: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Deep history →
- Master Age of the Earth: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master endosymbiosis: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Cambrian: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master land: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master mass extinctions: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Punctuated equilibrium: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master species selection: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master exaptation: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master Hox: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master duplication: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
Human evolution →
- Master Apes and hominins: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master a bush of forms: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master admixture: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master recent selection: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
- Master clines: understand underlying structural mechanisms, biochemical pathways, and diagnostic indicators.
⚖️ Must-Know Comparison & Distinction Tables
1 TablesSide-by-side matrices comparing commonly confused biological mechanisms, kinetic types, and pathways.
Key Comparative Distinctions in Evolutionary Biology
| Conceptual Feature | Type A / Classical Model | Type B / Advanced Model | Significance in Exams |
|---|---|---|---|
| Structural Basis | Primary baseline configuration | Modified / adaptive architecture | Distinguishes specialized physiological adaptations |
| Kinetic / Regulatory Control | Constitutive / basal expression | Inducible / allosteric modulation | Crucial for feedback homeostasis questions |
| Experimental Verification | In vitro biochemical assay | In vivo genetic knock-down / tagging | Commonly tested in research methodology questions |
⚠️ Examiner Traps & Common Student Mistakes
2 PitfallsClassic trap questions designed by examiners to catch uncritical students. Don't lose easy marks here!
Overlooking Feedback Regulation in Evolutionary Biology
Treating biological pathways as simple linear forward sequences.
Almost all physiological and molecular circuits operate via negative feedback, feed-forward loops, or reciprocal allosteric control.
Confusing In Vitro with In Vivo Phenotypes
Assuming enzyme or cellular behavior in isolated buffer mirrors complex in vivo conditions.
Cellular crowding, compartmentalization, and membrane microdomains significantly alter binding affinities and kinetic rates.
📐 Key Formulas & Numerical Constants
2 FormulasStandard Equilibrium Constant
Keq = [Products] / [Reactants]Determines direction of chemical/biological reactions at dynamic equilibrium.
Relative Quantitative Ratio
Ratio = Experimental_Value / Baseline_ControlStandardizes comparative fold-change in quantitative biological assays.
🏛️ Landmark Scientists & Nobel Discoveries
6 PioneersFrequently tested in historical milestone and match-the-following exam questions.
Gregor Johann Mendel
🏅 Pre-dated the Nobel Prize; unanimously recognized as the Father of Modern GeneticsMajor landmark discoveries
Lynn Margulis
🏅 National Medal of Science (1999); Member of the National Academy of Sciences (1983)Major landmark discoveries
Carl Richard Woese
🏅 Crafoord Prize in Biosciences (2003, royal Swedish Academy of Sciences)Major landmark discoveries
Sir Frank Macfarlane Burnet
🏅 Nobel Prize in Physiology or Medicine (1960) for discovery of acquired immunological toleranceMajor landmark discoveries
Aristotle
Major landmark discoveries
Georges Cuvier
Major landmark discoveries
🎯 Rapid-Fire Active Recall Checklist
10 QuestionsTest your memory before stepping into the exam hall. Try to answer mentally, then tap "Reveal Answer" to verify!