There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Amino acids.
Selected Biological Response Modifiers
Made over Made better
Find derivative using chain rule
Chart showing average yearly dose of radiation from natural and human-made sources
Relationship between the number of amino acid substitutions