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Question: Steve is in the midst of his Microbe experiment. He is growing mold on a piece of peach. After 5 days in the baggie, the mold covers 88 square millimeters of the peach surface. After nine days in the baggie the mold covers 120 square millimeters of the peach surface. […]

Diagnosis is given and we are asked to answer questions about the patient and her condition. Mrs. Smith, 57, is complaining of chest pain for the last couple of months. Prior to the current pain she used to complain of tightness in her chest. She smokes 20 cigarettes a day, […]

Q1. The neurotransmitter acetylcholine is made in the cytosol and then transferred into synaptic vesicles, where its concentration is more than 100 fold higher than in the cytosol. Synaptic vesicles isolated from neurons can take up additional acetylcholine if it is added to solution in which they are suspended but […]

Alonso and Bernd are hiking in Yellowstone National Park. As they come around a sharp bend in the trail, they surprise a mother bear and her two cubs. The mother bear makes her displeasure at being surprised by the two hikers very clear. As fate would have it, Alonso is […]