Nicky delivered a comprehensive lesson on mutations and cell division for the IGCSE biology course, explaining the scientific concepts of genetic mutations, their causes, and their potential effects on organisms. She discussed how mutations can occur randomly but can be inherited through sex cells, and covered the relationship between genotype and phenotype, including how mutations can affect enzyme function and protein formation. Nicky also explained how mutations can contribute to evolution by providing advantageous traits, and concluded with a review of key concepts and encouragement for students to review the material.