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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
Vaccines prevent between 2.5 and 4 million deaths every year.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
![The first step is to verify the proper operation of the tester by measuring the air frequency by ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_36_29_293831770.png)
![Record the AC frequency as shown on the meter and subtract 50 from the reading (e.g., 60.50 -50.00 = ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_37_45_293851893.png)