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Q1. E.coli was incubated with aeration in a nutrient medium contain two carbon sources, and the following growth curve was made from this culture. a.) Describe what happened at the time marked “x”. b.) Which substrate provided “better” growth conditions for the bacteria? How could you tell? Q2. Mary is […]

1. Why is it notnormally possible for action potentials in the postsynaptic neuronto produce an action potential in the presynaptic neuron?A.because the axon terminals of presynaptic neurons have noacetylcholine receptorsB.because the presynaptic neurons do not have a resting membranepotentialC.because the synaptic cleft allows the diffusion of acetylcholinein one direction onlyD.because […]

Snouters are small critters that live on both sides of the Ohio River. A population on the north side of the Ohio River is fixed for an allele for blue feet. The population on the south side of the river is fixed for an allele for pink feet. Twenty blue-footed […]

1. A girl notices that her guppies reproduces most when herfish tank water is slighty alkaline. they stop reproducing if thewater becomes acidic or if the water becomes too alkaline. this isan exampleof: a) secondary sucessionb) zone of tolerance and intolerancec) communitiesd) intertidal zones 2. when ling increased the amount […]