During 1998, a total of 126 new cases of St. Louis encephalitis (SLE) were reported from a community having a healthy population of 20,000. -Of the 126 cases of SLE previously referred to, none occurred during the period January through March, 5 occurred during the period April through June, 113 occurred during July through September, and 8 occurred during October through December. What is the proportional distribution of the cases by season?

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

answer; i believe the correct answer is (sporophyte);

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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