Collagen
Keratin
Calcium
Elastin
Chitin
Correct answer is B
Keratin is the primary protein that makes up human nails.
How do you enable auto-playing videos on Twitter?...
Which continent is known as the "Cradle of Civilization"?...
What is the main currency in "The Elder Scrolls V: Skyrim"?...
What does IoT stand for in technology?...
How do you add end screens to a YouTube video?...
What is the political term for the power of the courts to declare laws unconstitutional?...
What is observed on May 22 globally?...
How can you improve your farming efficiency in resource management games?...
How do you upload a cover video for a Facebook Page?...
What is the traditional German dish made of fermented cabbage?...