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Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
Lampreys (sometimes also called lamprey eels) are a family of jawless fish
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Posterior views of H. erectus, Neandertal, and modern H. sapiens show differences in vault shape.
Types of Bacteria