Edexcel A-Level Biology AS 4.15 Variety of Life and Human Threats Topic Practice

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Pearson Edexcel IAL Biology

Unit 1: Molecules, Diet, Transport and Health

Topic 1 - Molecules, Transport and Health

Topic 2 - Membranes, Proteins, DNA and Gene Expression

Unit 2: Cells, Development, Biodiversity and Conservation

Topic 3 - Cell Structure, Reproduction and Development

Topic 4 - Plant Structure and Function, Biodiversity and Conservation

4.1—Plant cell structure and ultrastructure

4.2—Recognising plant organelles in EM images

4.3—Starch, cellulose and cellulose microfibrils

4.4—Cellulose microfibrils and secondary thickening

4.5—Sclerenchyma, xylem and phloem

4.6—Core Practical 7 - plant tissue microscopy

4.7—Plant fibres, starch and sustainability

4.8—Water and inorganic ions in plants

4.9—Core Practical 8 - tensile strength of plant fibres

4.10—Conditions for bacterial growth

4.11—Plant-derived therapeutic substances

4.12—Core Practical 9 - antimicrobial properties of plants

4.13—Development of drug testing

4.14—Classification and taxonomy

4.15—Variety of life and human threats

4.16—Biodiversity and endemism

4.17—Measuring biodiversity and heterozygosity

4.18—Comparing biodiversity with index of diversity

4.19—Niche and adaptations

4.20—Hardy-Weinberg, allele frequency and speciation

4.21—Conservation by zoos and seed banks

4.R1—Recommended Additional Practical - plant mineral deficiencies

Unit 3: Practical Skills in Biology I

Practical Skills in Biology I

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