Inside the nucleus are chromosomes carrying your dna. this has the genetic information for everything in your body. what part of a mall is like the dna in your nucleus? largest department store (i. e. macy's) mall directory food court entrance to the mall

Im taking this test im in 7th grade the answer is MALL DIRECTORY it is like the DNA it contains information where to go

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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poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.