Explanation:
Most of Earth's carbon is stored in rocks and sediments.
Answer:
Coal is mined in two different ways: from deep underground and in
strip mines. In both cases the land that is mined is leased by the coal companies, while the ownership remains in public hands. Deep mines are reached through a shaft into the ground, through which miners gain access to the coal seam and out of which comes the coal. Strip mines are used when the coal seam is near the surface. The topsoil and other overburden materials are removed by giant power shovels and piled out of the way. The shovels then dig out the coal. After the coal has been mined, there may be environmental reclamation to return the land to its original state, thus allowing others continued use of it for their own purposes. This involves refilling the hole, spreading topsoil, and then planting new vegetation on it.
<span>The correct answer is membrane. Just like the fence protects the yard so does a membrane protect the cell. It prevents things from getting in or out unless passageways are created. The things in the yard would be the mitochondria and other organelles, while the air in the yard and the ground where all things are found would be the cytoplasm. The membrane protects what's in just like a fence protects those in the yard.</span>
Answer:
Life exit under frozen surfaces in polar seas because of the anomalous behavior of water.
Explanation:
Water behaves irregularly, which helps in preventing the total freezing of seas during winter.
Since water has its highest density at C, the surface of seas freezes while the lower regions or layers is in form of liquid. During winter, as the temperature decreases to C, the layer of water with highest density sinks to the bottom while those that are less dense floats to the top. Thus when the surface temperature is below , the lower layers under the frozen surface are at temperature range between C to C
The a carbon, carboxyl, and amino groups.