IB Biology SL A2.1.7 Evidence for Last Universal Common Ancestor Luca Topic Practice

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A Unity and Diversity

A1.2 Nucleic acids

A2.1 Origins of cells

A2.1.1—Conditions on early Earth

A2.1.2—Cells as smallest units of life

A2.1.3—Spontaneous origin of cells

A2.1.4—Evidence for origin of carbon compounds

A2.1.5—Spontaneous formation of vesicles

A2.1.6—RNA as presumed first genetic material

A2.1.7—Evidence for last universal common ancestor (LUCA)

A2.1.8—Dating first cells and LUCA

A2.1.9—Evolution near hydrothermal vents

A2.2 Cell structure

A3.1 Diversity of organisms

A4.1 Evolution and speciation

A4.2 Conservation of biodiversity

B Form and Function

B1.1 Carbohydrates and lipids

B2.1 Membranes and membrane transport

B2.2 Organelles and compartmentalization

B2.3 Cell specialization

B3.1 Gas exchange

B4.1 Adaptation to environment

B4.2 Ecological niches

C Interaction and Interdependence

C1.1 Enzymes and metabolism

C1.2 Cell respiration

C1.3 Photosynthesis

C2.2 Neural signalling

C3.1 Integration of body systems

C3.2 Defence against disease

C4.1 Populations and communities

C4.2 Transfers of energy and matter

D Continuity and Change

D1.1 DNA replication

D1.2 Protein synthesis

D1.3 Mutation and gene editing

D2.1 Cell and nuclear division

D2.3 Water potential

D3.1 Reproduction

D3.2 Inheritance

D3.3 Homeostasis

D4.1 Natural selection

D4.2 Stability and change

D4.3 Climate change

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