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Author Question: In a caste society, there are few, if any, opportunities for upward mobility. Indicate whether ... (Read 87 times) |
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
Cyanide works by making the human body unable to use oxygen.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.