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Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Operator, Repressor Operator, Repressor
Operator using personal protection equipment. Operator using personal protection equipment.
Structural model of the Cro dimer–operator complex Structural model of the Cro dimer–operator complex
Arithmetic Progression Arithmetic Progression
Models of the lac repressor and its binding to operator sites in DNA Models of the lac repressor and its binding to operator sites in DNA
Constitutive operator (OC) mutations Constitutive operator (OC) mutations
Video: Origin of organelles Animation

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