Edexcel A Level Biology A - Topic 4: Drug Testing and Plant Structures (2/2)

A* Level notes covering the second section of Topic 4 (Biodiversity and Natural Resources). This includes the section on Drug Testing (including defining drugs, drugs we derive from plants, how we ensure validity in drug trials, the stages of clinical trials, the origin of clinical trials from digitalis soup, the impact of using animals in our trials, the use of aseptic techniques, and the core practical about the microbiobal properties of plants)

Also includes the section of Plant Structures and Roles - including transportation, translocation, the phloem and xylem, the structure of starch and cellulose (and how they differ) the varying organelles in plants and their structure and function (e.g. vacuoles, chloroplasts, amyloplast, the cell wall), why we use plant fibers. Also includes the core practicals identifying plant fibers, testing the tensile strength of plant fibers, and looking at the minerals plants need to grow.