The presence of limestone<span> and other calcium carbonate rock in </span>lakes<span> and streams helps to maintain a constant pH </span>because<span> the minerals react with the excess </span>acid<span>. However, </span>acid rain<span> eventually can overcome the buffering capacity of the surface water.
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Answer:
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.
Explanation
The correct option is B.
There are two major stages in photosynthesis, the light reaction and the Calving cycle. The Calving cycle involves the fixation of the atmospheric carbon dioxide and the reduction of the fixed carbon dioxide into carbohydrate. The intermediate product from one turn of the Calving cycle are two glycealdehyde-3- phosphate molecules, each molecule is made up of three carbons.<span />
The answer is (y-7x)(7x+y)
It is this because you must have y^2 which is two y's thats why there is two y's in the answer and -7 and 7 because -7×7= -49
<span>Embryological studies suggest that the most ancient chordates were related to the ancestors of echonderms</span>
