|
|
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
![Anatomically modern humans from the Israeli cave sites of Skhul and Qafzeh may be the earliest found](https://biology-forums.com/gallery/47/medium_273688_23_02_15_7_03_10_2082494.jpeg)
![The Warm Mineral Springs individuals from Florida may be among the earliest Paleo-Indian skeletal re](https://biology-forums.com/gallery/47/medium_273688_23_02_15_7_03_16_20833983.jpeg)