- Grade 11 and 12 Mathematics (Moderator: geoffrey)
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Author Question: Darren purchased $250 000 in 364-day T-bills 315 days before maturity to yield 2.86%. After holding ... (Read 70 times) |
- Grade 11 and 12 Mathematics (Moderator: geoffrey)
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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 longest a person has survived after a heart transplant is 24 years.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.