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erica [24]
3 years ago
5

Driving automobiles and burning coal for electricity are examples of two human activities that negatively impact _______.

Biology
1 answer:
marissa [1.9K]3 years ago
3 0

Answer:

air quality

Explanation:

because it releases greenhouse gasses that pollute the air

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Choose the answer that best completes the sentence below.
n200080 [17]

Living and nonliving things in an ecosystem interact with each other; on the other hand, plants use energy from the sun.

Explanation:

The ecosystem is an interaction circumstance between the living and non - living things which exists in an environment and has an impact on its too. The essential source of energy to this ecosystem is the solar energy coming from the sun.

But the energy from the sun could only be taken up by the plants and being used in photosynthesis to produce food and oxygen which required by other living things of the ecosystem. This essentiality is exclusive of the plants.

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3 years ago
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3 years ago
Which of the following will not contribute to resource conservation?
DaniilM [7]
<span>Here are the choices:
a. using solar power
b. recycling glass
c. using nuclear power
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7 0
3 years ago
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A food chain includes grass, grasshopper, and an owl .what would happen if very dry weather killed the grass?
yuradex [85]
The grasshopper would die
5 0
3 years ago
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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.

4 0
3 years ago
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