What primary product is formed during nitrogen fixation? a. Urea b. Carbon dioxide c. Oxygen d. Glucose e. Ammonium
What is the end product of carbon respiration? a. Oxygen b. Nitrogen c. Ammonium d. Carbon dioxide e. Glucose
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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."
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
The average adult has about 21 square feet of skin.
There are 20 feet of blood vessels in each square inch of human skin.
The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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