Sulfur dioxide<span> and </span>nitrogen oxide mix <span>with the water molecules in the atmosphere to produce acidic rain </span>
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Cells make up the smallest level of a living organism such as yourself and other living things. The cellular level of an organism is where the metabolic processes occur that keep the organism alive. That is why the cell is called the fundamental unit of life.
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Attached is an image go help you with this.
Enters the left atrium...this is the oxygenated blood from the lungs (pulmonary)
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an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.A microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope.
