1.) How would you make 100mL of a 20% EtOH solution starting with 100% EtOH and water? 2.) How would you make 100mL of 0.25M solution of NaCl? 3.) Explain how you would make 500mL of a solution containing 0.20M of NaCl (58g/m) 0.005M EDTA (342g/m) and 0.10M Tris (121g/m) starting with solids and water.

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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there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles