Answer:
The <u>air quality index</u> is a measure of ozone and other pollutants in the air.
Explanation:
The correct answer is B. Tundra
Tundras are the coldest places in the world and are located far north, around the arctic circle, and incorporates countries such as Finland, Russia, Alaska, and others.
Answer:
✨Chemicals in the air create too much oxygen.✨
Explanation:
✨ plant-like algae bloom in polluted waters and create oxygen-depleted dead zones.✨
✨Water pollution that alters a plant’s surrounding pH level, such as acid rain, can harm or kill the plant. Acid rain forms because of atmospheric sulfur dioxide and nitrogen dioxide, which are emitted from natural and human-made sources. These include volcanic activity and burning fossil fuels.✨
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Answer:
Action potential.
Explanation:
Action potential may be defined as the change of the membrane potential of the cell with response to the stimulus. The different ions enter and exit the cells.
Action potential generates in the cell when the threshold voltage - gated channel reaches and opens the voltage gate channel. The opening of voltage gated channel changes the membrane potential of the cell.
Thus, the correct answer is option (4).
