The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Did you know?
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
Basal cell carcinoma.
A typical eukaryotic cell.
Membrane potential of a cell permeable to potassium only.
The bacterial cell wall: (a) gram-positive bacterium; (b) gram-negative bacterium.
Cell surface recognition factors
A sample of work by a Grade 4 student with a specific learning disorder