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Did you know?
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.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.