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Every seventh time a rat presses a lever, it receives food pallets.
Answer:
Lung. The number one killer amongst cancers is the cancer of the lungs and bronchioles in the body. ...
Colon. The second are the cancers that attack the rectum and the colon which has a death toll of approximately 300,000 people now.
Breast. The third is a cancer that occurs most in women and is breast cancer.
Explanation:
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20 teeth
By the time the embryo is eight weeks old, there are ten buds on the upper and lower arches that will eventually become the primary dentition. These teeth will continue to form until they erupt in the mouth.
