The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest pool of nitrogen.
Topher Grace. Christopher John Topher Grace (/ËtoÊfÉr/; born July 12, 1978) is an American actor. He is known for his portrayal of Eric Forman on the Fox sitcom That '70s Show, Eddie Brock/Venom in the Sam Raimi film Spider-Man 3, Carter Duryea in the film In Good Company and Edwin in the 2010 film Predators. 1 Early life.
Madeline Zima Place of Birth is New Haven. Madeline Rose Zima is an American actress. She is best known for her six years as Grace Sheffield on the TV series The Nanny or more recently as Mia Lewis on the Showtime comedy-drama Californication and as Gretchen Berg on Heroes . Zima was born in New Haven, Connecticut, to Marie and Dennis Zima.