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(also called a glacial age) a long period of low temperature on Earth, during which large sheets of ice form as glaciers and as ice masses at the poles.
is the supply of materials, in the form of food, required by organisms and cells to stay alive...
the blood vessel that carries blood from the digestive tract to the liver.
kidney failure which develops over a long period of time.
a crop consisting of one plant species which is cultivated over a large area.
the series of activities that takes place in a cell leading to its division and duplication (...