Motor neurons release the neurotransmitter acetylcholine (ach) and acetylcholinesterase degrades ach in the synapse. if a neurophysiologist applies onchidal (a naturally occurring acetylcholinesterase inhibitor produced by the mollusc onchidella binneyi) to a synapse, what would you expect to happen?
a) paralysis of muscle tissue
b) gradual loss of resting potential
c) decrease in the frequency of action potentials
d) convulsions due to constant muscle stimulation
e) no effect

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Explain why ecosystem diversity results in species diversity in a healthy biosphere