Biology  by Bradford
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FREE · IB AND AP BIOLOGY · 17 OF 98 WRITTEN

Interactive guides

A topic at a time: figures that build up step by step, short animations that play as you reach them and that you can change while they run, a dry lab where you set the variables, a check on exam questions from the question bank, and, for the teacher, lesson plans with editable slides for each lesson, a note template for the class and an offline copy for a room with no internet.

IB Biology revision guide (PDF)AP Biology revision guide (PDF)Browse the sims

What a guide does

Each guide teaches one topic the way a good lesson does, then lets the student try it.

  • Short animations like this one play as you reach them, and you can change them while they run.
  • Figures build up a step at a time, and parts you tap explain themselves.
  • Predict first, then see what happens; mnemonics that flip; the mistakes examiners see every year.
  • A dry lab: set the variables, run trials, graph your results.
  • A check on exam questions from the question bank: a fresh paper each time, marked as you go.
  • For the teacher: a plan and editable slides for each lesson, the animations as video, a note template, a revision book.

A1.1 WaterA1.2 Nucleic acidsA3.1 Diversity of organismsA3.2 Classification and cladisticsA4.1 Evolution and speciationB1.1 Carbohydrates and lipidsB1.2 ProteinsC1.1 Enzymes and metabolismC1.2 Cell respirationC1.3 PhotosynthesisD1.1 DNA replicationD1.2 Protein synthesisD3.2 InheritanceD4.1 Natural selection3.1 to 3.3 Enzymes and cellular energy3.4 Photosynthesis3.5 Cellular respiration

IB Biology

AUnity and diversity

BForm and function

  • B1.1Carbohydrates and lipids
  • B1.2Proteins
  • B2.1Membranes and membrane transport
  • B2.2Organelles and compartmentalization
  • B2.3Cell specialization
  • B3.1Gas exchange
  • B3.2Transport
  • B3.3Muscle and motility HL
  • B4.1Adaptation to environment
  • B4.2Ecological niches

CInteraction and interdependence

DContinuity and change

AP Biology

U1Chemistry of Life

  • 1.1Structure of Water and Hydrogen Bonding
  • 1.2Elements of Life
  • 1.3Introduction to Macromolecules
  • 1.4Carbohydrates
  • 1.5Lipids
  • 1.6Nucleic Acids
  • 1.7Proteins

U2Cell Structure and Function

  • 2.1Cell Structure and Function
  • 2.2Cell Size
  • 2.3Plasma Membrane
  • 2.4Membrane Permeability
  • 2.5Membrane Transport
  • 2.6Facilitated Diffusion
  • 2.7Tonicity and Osmoregulation
  • 2.8Mechanisms of Transport
  • 2.9Cell Compartmentalization
  • 2.10Origins of Cell Compartmentalization

U3Cellular Energetics

U4Cell Communication and Cell Cycle

  • 4.1Cell Communication
  • 4.2Introduction to Signal Transduction
  • 4.3Signal Transduction Pathways
  • 4.4Feedback
  • 4.5Cell Cycle
  • 4.6Regulation of Cell Cycle

U5Heredity

  • 5.1Meiosis
  • 5.2Meiosis and Genetic Diversity
  • 5.3Mendelian Genetics
  • 5.4Non-Mendelian Genetics
  • 5.5Environmental Effects on Phenotype

U6Gene Expression and Regulation

  • 6.1DNA and RNA Structure
  • 6.2DNA Replication
  • 6.3Transcription and RNA Processing
  • 6.4Translation
  • 6.5Regulation of Gene Expression
  • 6.6Gene Expression and Cell Specialization
  • 6.7Mutations
  • 6.8Biotechnology

U7Natural Selection

  • 7.1Introduction to Natural Selection
  • 7.2Natural Selection
  • 7.3Artificial Selection
  • 7.4Population Genetics
  • 7.5Hardy-Weinberg Equilibrium
  • 7.6Evidence of Evolution
  • 7.7Common Ancestry
  • 7.8Continuing Evolution
  • 7.9Phylogeny
  • 7.10Speciation
  • 7.11Variations in Populations
  • 7.12Origins of Life on Earth

U8Ecology

  • 8.1Responses to the Environment
  • 8.2Energy Flow Through Ecosystems
  • 8.3Population Ecology
  • 8.4Effect of Density on Populations
  • 8.5Community Ecology
  • 8.6Biodiversity
  • 8.7Disruptions in Ecosystems