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Ecological pyramids in food webs.
Color enhanced X ray of large malignant tumor in the right lung.
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Colon with diverticulosis. An inflamed or infected diverticulum is called diverticulitis.
A typical large tool box, showing just one of many drawers.
Cystic fibrosis is caused by a mutation in a protein called CFTR