At the end of winter, water containing very high concentrations of road salt used to deice roadways runs off and some of it enters a very small freshwater pond that contains many aquatic organisms including paramecium. What do you suppose will happen to the paramecium? a
The paramecium's environment will become hypertonic causing paramecium cells to burst

b
The paramecium's environment will become hypotonic causing paramecium cells to burst

c
The paramecium's environment will become hypotonic causing paramecium cells to shrivel

d
The paramecium's environment will become hypertonic causing paramecium cells to shrivel

D

Explanation:

The water molecules in the cell will want to move out of the cell into the pond in attempt to lower the salt concentration which will cause the cells to shrivel up with the loss of water. This is also called becoming hypertonic.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

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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