History: A 20 year old female presented to her general practitioner (GP) after suffering from a 24 hour bout of a productive cough which had got worse throughout the night. She was previously fit and well and visited the gym regularly. She was asked to provide a sputum sample by […]

Part I – The Symptoms Imagine that you work at the medical examiner’s office for a major metropolitan city. As Chief Medical Offi cer, you investigate suspicious deaths and provide toxicology services for the county. Unfortunately, it’s been a busy week. In the past five days, seven people have died, […]

1. How are keystone species linked to species richness? Provide an example of a keystone species.2. Provide a specific example of how a trophic level in a food chain might occasionally interact with another food chain and in doing so, become part of a larger food web. You may make […]

Mutants Substances E and G are both required for growth in N. crassa. The pathway below indicates the biosynthetic pathway and where, in the pathway, specific mutants are blocked in the pathway. Fill in the table below, indicating whether each intermediate will allow (+) or will not allow (-) growth […]