Mitochondria. This isn't called the powerhouse of the cell for no reason. lol
This process is active transport.
Unlike other methods such as diffusion or osmosis, active transport requires extra energy provided by the organism from such as cellular respiration. In addition, they also require a carrier protein, which can change its shape to bring the substance through the cell membrane.
Some examples requiring active transport may include root hair cells absorbing mineral ions, or our small intestine absorbing digested nutrients into our body.
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Usually, with increased population growth, there is a direct increase in demand for resources such as water.
Explanation:
When the demand for water by the population overwhelms the supply from surface sources such as lakes and rivers, underground water is taped. Boreholes are sunk to reached water aquifers.
However, drawing underground water more than it is replenished by precipitation, lowers the water table. As a consequence deeper boreholes have to be sunk to reach more underground water. A critically lowered water table can result in drought in the region.
Learn More:
For more on supply and demand for resources check out;
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The astronomers rate the magnitude of a star with a SCALE.
