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Author Question: Pushing and pulling are mutually exclusive activities. a. True b. False Indicate whether the ... (Read 70 times) |
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.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.