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Parameters in a model can interact with each other, so that the sensitivity of the model to one parameter depends on the value of a second parameter. The same is true of species’ behavioral characteristics, in terms of how they can affect population persistence in new or altered environments. Recall […]

1. Describe how the lac operon functions when glucose and lactose levels are high. 2. Describe how the lac operon functions when glucose levels are low and lactose levels are high. 3. Describe how the lac operon functions when glucose levels are low and lactose levels are both absent. 4. […]

Two closely related species of wolf spiders live together in northern California. However, meadow wolf spiders are only observed in meadows and forest wolf spiders are only observed in the forest. Both species are found near forest-meadow edges. You hypothesize that both heat (high in the meadow, low in the […]

Q1. An individual with condition of myasthenia gravis is faced with an autoimmune disorder in which the body defences attack acteylcholine receptors on muscle cells. What will be the expected effect on calcium levels near contractile proteins, follow arrival of an electrical impulse at those neuromuscular junctions? Q2. Examine the […]