|
Fact |
Category |
Date |
|
841 |
Xylitol is good for your teeth. |
Science > Chemistry |
02/15/09 |
|
842 |
Thymine and cytosine are pyrimidines, meaning they have a single ring. |
Science > Biology |
02/15/09 |
|
843 |
In 1928, Frederick Griffith discovered what he called the "transforming principle", or what is now known as DNA. |
Science > Biology |
02/12/09 |
|
844 |
The imaginary unit, commonly referred to as "i", is the square root of negative one. |
Science > Math |
02/06/09 |
|
845 |
Lipids have a monomer made up of three fatty acids and a glycerol and are mostly made of carbon, hydrogen, and oxygen. |
Science > Biology |
02/06/09 |
|
846 |
Proteins often end with "in" or "ine" and have a monomer of amino acids. |
Science > Biology |
02/06/09 |
|
847 |
Nucleic acids have a monomer of nucleotides and are made up of hydrogen, carbon, oxygen, and nitrogen. |
Science > Biology |
02/06/09 |
|
848 |
DNA stands for deoxyribonucleic acid and contains genetic code. |
Science > Biology |
02/06/09 |
|
849 |
Carbohydrates are made up of three elements: carbon, hydrogen, and oxygen; they have a monomer of sugars or starches. |
Science > Biology |
02/05/09 |
|
850 |
The first electric battery was the voltaic pile, invented by Alessandro Volta in 1800. |
Science > Physics |
02/04/09 |
|
851 |
By mass, about 18% of the human body is composed of the element carbon. |
Science > Biology |
02/03/09 |
|
852 |
Carcinogens are any substances that have the capability of causing cancer. |
Science > Biology |
02/03/09 |
|
853 |
In humans and most mammals, a female has two X chromosomes. |
Science > Biology |
02/02/09 |
|
854 |
By mass, about 3% of the human body is composed of the element nitrogen. |
Science > Biology |
02/02/09 |
|
855 |
Batteries, thermocouples, and solar cells produce direct current. |
Science > Physics |
02/02/09 |
|
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