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jenyasd209 [6]
3 years ago
9

What is the main system political parties use to nominate candidates in the modern US political system?

Biology
1 answer:
Degger [83]3 years ago
8 0
I think the correct answer from the choices listed above is option A. The main system political parties that use to nominate candidates in the modern US political system is the primary system. In a primary the vote is cast by a secret ballot in order to decide the candidate of the party.
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The answer is (C.) The rotation of Earth
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How do rates of mutation "power" molecular clocks?
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What structures have rna
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Once a neuron is stimulated and the membrane potential is depolarized, the depolarized axonal membrane is helped to return to it
Vadim26 [7]

Answer:

Explanation:

The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.

The potential difference arises when the membrane is selectively permeable to some ions. The resting potential is -70mV.  

When the neurons get excited, the sodium ions start to enter by sodium channels.  

Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.

When the inside environment of the cell is more positively charged, the potassium ions start to move out of the cell. It goes out by the voltage-gated channels. Thus resting stage is maintained and it is known as repolarization.

But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.

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3 years ago
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After constructing a prototype of the device, the student concludes that in many regions the monetary cost of building and insta
Inessa05 [86]

Answer:

After constructing a prototype of the device, the student concludes that in many regions the monetary cost of building and installing the  device would be higher than the cost of acquiring water from other sources. Which of the following would be most appropriate for the  student to do next?

redesign the device without the solar panel so that it plugs into an electrical outlet

Explanation:

Because of cost implication, the device is redesigned in order to use other source rather than water which would be cost-effective and generally accepted for use.

8 0
3 years ago
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