Jennifer R. has the “stomach flu” that is going around campus and has been vomiting profusely for the past 24 hours. Not only has she been unable to keep down fluids or food, but she has also lost the acidic digestive juices secreted by the stomach that are normally reabsorbed […]

Organism and population  One mark questions:  1. Define benthic Zone? 2. Define the term ecological factor? 3. Name only one intracellular parasite? 4. What is biome? 5. Name the type of interaction seen between whale and barnacles growing on its back?  Two mark question:  1. Distinguish between the following : ectoparasites and endoparasites? 2. What […]

Lagniapposis is caused by a microparasite, Boudreauxia thibodauxi, and is transmitted directly by coughing and sneezing. It is highly transmissible and very virulent. Infected hosts become immune after a week if they do not die. Use the equation for directly transmitted microparasites to discuss the following. A. Lagniapposis’ current critical […]

1. Biologists frequently use phosphate-buffered solutions in experiments.  You need to prepare a sodium phosphate solution at pH 6.7 by mixing NaH2PO4 and Na2HPO4 (pKa =7.2).  What are the respective concentration of each of these substances if you want the final concentration of phosphate ([HPO4-2]+[H2PO4-] to be 150 mM? 2. Activity […]