use of a microscope containing improved lenses that could magnify objects almost 300-fold, or 270x. Under these microscopes, Leeuwenhoek <span>found motile objects. </span>
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what picture?
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The main role of DNA in the cell is it's a Long term storage of information
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The main role is to read the genetic code, cells make a copy of a stretch of DNA in the nucleic acid RNA
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Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.