|
|
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.
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
![It is important for new employees to know the location of all fire extinguishers. (C) Sweep the area ...](https://biology-forums.com/gallery/47/medium_665046_01_03_17_9_46_55_26116670.jpeg)
![A beam-type torque wrench that displays the torque reading on the face of the dial. The beam display ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_36_00_294101840.png)
![This training vehicle fell from the hoist because the pads were not set correctly. No one was hurt, ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_45_06_294741512.png)