|
Fact |
Category |
Date |
|
226 |
By mass, about 65% of the human body is composed of the element oxygen. |
Science > Biology |
02/02/09 |
|
227 |
The term "battery", coined by Benjamin Franklin, was named after a battery of cannon. |
Science > Physics |
02/02/09 |
|
228 |
Primate cells, except for those of humans, have 24 pairs of chromosomes. |
Science > Biology |
02/02/09 |
|
229 |
By mass, about 10% of the human body is composed of the element hydrogen. |
Science > Biology |
02/02/09 |
|
230 |
Batteries, thermocouples, and solar cells produce direct current. |
Science > Physics |
02/02/09 |
|
231 |
By mass, about 3% of the human body is composed of the element nitrogen. |
Science > Biology |
02/02/09 |
|
232 |
In humans and most mammals, a female has two X chromosomes. |
Science > Biology |
02/02/09 |
|
233 |
Carcinogens are any substances that have the capability of causing cancer. |
Science > Biology |
02/03/09 |
|
234 |
By mass, about 18% of the human body is composed of the element carbon. |
Science > Biology |
02/03/09 |
|
235 |
The first electric battery was the voltaic pile, invented by Alessandro Volta in 1800. |
Science > Physics |
02/04/09 |
|
236 |
Carbohydrates are made up of three elements: carbon, hydrogen, and oxygen; they have a monomer of sugars or starches. |
Science > Biology |
02/05/09 |
|
237 |
DNA stands for deoxyribonucleic acid and contains genetic code. |
Science > Biology |
02/06/09 |
|
238 |
Nucleic acids have a monomer of nucleotides and are made up of hydrogen, carbon, oxygen, and nitrogen. |
Science > Biology |
02/06/09 |
|
239 |
Proteins often end with "in" or "ine" and have a monomer of amino acids. |
Science > Biology |
02/06/09 |
|
240 |
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 |
|
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