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Pearson Edexcel International GCSE Biology (4BI1)

1 The nature and variety of living organisms

(a) Characteristics of living organisms

(b) Variety of living organisms

2 Structure and functions in living organisms

(a) Level of organisation

(b) Cell structure

(c) Biological molecules

(d) Movement of substances into and out of cells

(f) Respiration

(g) Gas exchange

2.40B Diffusion in gas exchange

2.41B Gas exchange in respiration and photosynthesis

2.42B Leaf adaptations for gas exchange

2.43B Stomata in gas exchange

2.44B Light intensity and net gas exchange

2.45B Light and leaf gas exchange practical

2.46 Thorax structure

2.47 Ventilation muscles

2.48 Alveoli adaptations

2.49 Biological consequences of smoking

2.50 Ventilation practical

(j) Co-ordination and response

3 Reproduction and inheritance

(a) Reproduction

(b) Inheritance

4 Ecology and the environment

(a) The organism in the environment

(b) Feeding relationships

(c) Cycles within ecosystems

(d) Human influences on the environment

5 Use of biological resources

(a) Food production

(b) Selective breeding

(c) Genetic modification (genetic engineering)

6 Experimental skills

(a) Problem-solving and application

(b) Investigation planning and methods

(c) Observations, measurements and variables

(d) Analysis, communication and evaluation

7 Mathematical skills

1 Arithmetic and numerical computation

2 Handling data

5 Geometry and trigonometry

Question Bank/IGCSE Edexcel Biology/2 Structure and functions in living organisms/(g) Gas exchange/2.42B Leaf adaptations for gas exchange

Edexcel IGCSE Biology 2.42B leaf gas exchange adaptations

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