IB Biology HL C3.2.17 Herd Immunity Topic Practice

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A Unity and Diversity

A1.2 Nucleic acids

A2.1 Origins of cells

A2.2 Cell structure

A2.3 Viruses [HL only]

A3.1 Diversity of organisms

A3.2 Classification and cladistics [HL only]

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

B3.3 Muscle and motility [HL only]

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

C2.1 Chemical signalling [HL only]

C2.2 Neural signalling

C3.1 Integration of body systems

C3.2 Defence against disease

C3.2.1—Pathogens cause infectious diseases

C3.2.2—Skin and mucous membranes

C3.2.3—Blood clotting

C3.2.4—Innate vs. adaptive immune system

C3.2.5—Phagocytes

C3.2.6—Lymphocytes

C3.2.7—Antigens

C3.2.8—B-lymphocyte activation

C3.2.9—Clones of plasma cells

C3.2.10—Immunity from memory cells

C3.2.11—HIV transmission

C3.2.12—HIV infection and AIDS

C3.2.13—Antibiotics

C3.2.14—Antibiotic resistance evolution

C3.2.15—Zoonoses

C3.2.16—Vaccines and immunization

C3.2.17—Herd immunity

C3.2.18—COVID-19 pandemic data evaluation

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

D2.2 Gene expression [HL only]

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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