Pregnant women generally need to take a supplement that contains

Basically most women take prenatal vitamins such as 400mcg of folic acid 400IU of vitamin d 200 to 300 mg of calcium etc...

Explanation:

folic acid is important for certain function of the body

vitamin d is important to prevent rickits and the absorption of calcium

finally calcium is responsible for the enzymes in the body

hope that helps

answer: a. a gene that causes a specific trait.

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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