30-A1.1sts 

explain that scientific knowledge and theories develop through hypotheses, the collection of evidence, investigation and the ability to provide explanations (NS2);   e.g. • discuss the biological basis of neurological diseases such as Alzheimer’s or Parkinson’s disease and how this relates to treatment       • evaluate the impact of photoperiod (light wavelength and duration) on humans and identify adaptations to light deprivation in northern communities