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Level of Organization III: 
Organisms

This level considers all the following units: 
      • Unity and Diversity: A3.1, A3.2
      • Form and Function: B3.1, B3.2, B3.3
      • Interaction and Interdependence: C3.1, C3.2
      • Continuity and Change: D3.1, D3.2, D3.3

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A3.1 - Diversity of Organisms

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A3.2 - Classification & Cladistics (HL)

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B3.1 (Plants) - Gas Exchange

Form and function of plant cells in accordance with their gas exchange ability

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B3.2 (Plants) - Transport

Form and function of plant cells in accordance with their transportation qualities.

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B3.3 - Muscle and Motility

Muscle's idiosyncratic ability to contract and relax... how does this happen?

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C3.1 - Body System Integration

The workings of crucial communication between parts of an organism

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C3.2 - Defence Against Disease

How your body fights against foreign pathogens

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D3.1 - Reproduction

Female & male reproductive systems, the menstrual cycle, and fertilization (includes plant anatomy & reproductive capacity). 

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D3.3 - Hormones and Homeostasis

Different hormones and their roles in maintaining homeostasis within your body (includes a few C3.1 subunits; they make sense within the same context).

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D3.2 - Inheritance

Mendel's genetic models, Punnett squares, phenotypes vs. genotypes, sex determination, genetic disorders, etc.

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