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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.
The horizontal fraction bar was introduced by the Arabs.
![Ardipithecus kadabba has large canine teeth that are only slightly smaller than those of living apes](https://biology-forums.com/gallery/47/medium_295860_21_02_15_2_27_35_206981287.jpeg)
![The Taung Child, the first of the australopithecines to be discovered, is the type specimen for Aust](https://biology-forums.com/gallery/47/medium_295860_21_02_15_2_27_36_20700462.jpeg)