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One of the most puzzling questions in biology is how multi-cellularity arose. Explain the conditions under which having a body with more than one cell would have been adaptive. What kinds of problems do having larger and/or more cells present to an organism? What are some strategies used by these […]

Q1. A person has MG what would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions? Q2. Some of enzymes that oxidize sugars to yield useable cellular energy (for example, ATP) are regulated by phosphorylation. For these enzymes, […]

1. Surface tension is a force that holds the surface of a fluid together. It results from the cohesiveness of the liquid molecules. Explain what makes water molecules cohesive. 2. What characteristic(s) does a substance need to possess in order to be hydrophilic? 3. Explain why a column of water […]

A 67 year old man with a history of cigarette smoking and systemic hypertension collapses suddenly ans is reshed to the emergency room. Laboratory sties and an EKG confirm an acute myocardial infarction. The pateint is stabilized in the intesive care unit. Which of the following enymes regulates the synthesis […]